US1748914A - Cover-lining apparatus - Google Patents

Description

Feb. 25, 1930. .B. DEWEY COVER LINING APPARATUS Filed Feb. 15,

1928 2 Sheets-Sheet 1 Feb. 25, 1930. B. DEWEY COVER LINING APPARATUS Filed Feb. 15. 1928 2 Sheets-Sheet 2 Patented Feb. 25, 1930 UNITED" STATES PATENT? ori-10E BRADLEY .DEWEY, 0F CAMBRIDGE, MASSACHUSETTS, ASSIGNOR TO DEWEY AND ALMY CHEMICAL COMPANY, OF CAMBRIDGE, MASSACHUSETTS, A CORPORATION or MASSACHUSETTS COVER-LINING APPARATUS Application filed February 15, 1928. Serial No. 254,440.

This invention pertains to cover or cap lin ing apparatus designed to apply an annular band of lining compound to the inner surface of a receptacle cover or cap and relates more particularly to apparatus of that type in which the cover or cap is supported temporarily upon a rotating chuck while receiving the lining compound from a relatively stationary nozzle.

In machines of the above type the cover supporting chuck rotates and is raised and loweredintermittently, and covers orcaps are fed automatically to the chuck and delivered therefrom when the chuck is in its lowered position. The delivery of lining compound from the nozzle is also intermittent, taking place only during periods of elevation of the chuck, but its delivery or nondelivery during such periods is controlled by a so-called no-cover, no-compound mechanism which preventsdelivery ofcompo'und (even when the chuck is elevated) unless a cover is in compound-receiving position on the chuck. This no-cover, no-compound mechanism usually comprises anactuator, in the nature of afeeler or detector, commonly referred to as a-chuck -pad, to which operative movement is imparted'by a cover resting on the chuck, thereby through intermediate mechanism, causing the nozzle to open and deliver lining compound to the cover, the

pad remaining vquiescent and inoperative for such purposes'in the absence of a cover from V thechuckv j 35 It has been common, in "dealing" withsub stantially 'flat'yco v'ers, that is to say, vthose,

whose edges 'arebut little, if any, above the center panel, so to determine the normal po- Sition of the chuck-padfthat the cover, 'as'it ,is fed forward onto the chuck, engages the. pad with light'frictional contact thus preventing the rapidly dvaiming' cover from overrunn'ingthe chuck. Thus, in addition to its np ia'i'n" -function as a feeler or detector, the pad acts as a stop .or retarder 'for centering the cover on the chuck, and the pad success fully performsthis double function so long as the covers are substantially .fla't. Onthe other-hand, if the edge or rim of the cover orcap is raise'dt'o any substantialextent above its central panel, it becomes impractical to use the pad as a stop element, since if positioned low enough frictionally to engage the center panel of'the cover, it tends to dent or bend the upstanding edge or rim of the cover, and for this reason, in accordance with the present invention, I provide a stop member independent of the pad, and movable into and out of the path of the cover at proper intervals by the use of appropriate means hereinafter more fully described. 1

While the arrangement just outlined (including the independent stop) is eflicient and useful in dealing with covers or caps whose edges are but slightly above the center panel, I find that in dealing with covers or caps having very high rims or edges it is impracticable to dispose the chuck-pad at such a normal position or elevation as to permit the highrimmed cap to pass beneath it without damaging contact. Accordingly, in order that the apparatus may successfully deal with covers or caps of all usual types, regardless of the height of the rims, that is to say, Whether chuck rises and begins to rotate in-perfo'rming its usual cycle'of operation and thus preserve 1 the usual detector or feeler functionofthe padfor determining the deliveryfiof lining compond from the nozzle.-

Briefly outlined,.the sequence of operations of my new apparatus issubstantially as fol First, with the chuck down and stationary,

acov er or cap 1s advanced toward the chuck,

but before the cover reaches the chuck, the

chuckspad is elevated to permit the cover to I pass beneath it, As the cover continues toadva'nce,j th'es'top member is movedinto its path and brings the cover to're'st in centered posi tion upon the chuck. Thechnck-pa'd now (le scend's' until it is substantially 1n contact with the cover'on the'chuck and the'rotating chuck then rises. The lifting of the chuck with the cover mounted thereon raises the chuck-pad and, through appropriate mechanism, causes the nozzle to open and deliver lining compound to the rotating cover. After a proper interval, the chuck descends, permitt-ing the chuck-pad also to descend, and the nozzle closes. At some time during the above sequence of operations, the stop member has moved out of the path of the cover,'and the chuck-pad now rises and the cover is removed from the chuck by suitable and usual means, thus completing the cycle of operations and leaving the parts in position for the reception of another cover.

In the accompanying drawings I have illustrated one desirable embodiment of the invention by way of example, but wish it to be equivalent mechanism and without reference to the precise proportions of parts, the relative arrangement of the same, or the exact type of lining machine to which my invention is applied.

In the accompanying drawings,

Fig. 1 is a fragmentary plan view showing certain parts of a cap lining machine of usual type having the present improvements embodied therein;

Fig. 2 is a fragmentary side elevation o the mechanism shown in Fig. 1'; v

Fig. 2' is a plan View of a portion of the apparatus shown in Figs. 1 and 2, and showing the mechanism for removing a cover after adhesive has been applied thereto;

Fig. 3 is a fragmentary vertical section, to larger scale, substantially on the line 3-3 of Fig. 1; and j Figs. 4, 5, 6, 7, 8, 9 and 10 are fragmentary, more or less diagrammatic, views, partly in ,vertical section, illustrating various steps in the cycle of operations of my improved apparatus. Y

Referring to the drawings, the numeral 1 designates the main frame of the cover lining machine, which in general is of a type well known in the art. The covers or caps may be fed to the lining mechanism by hand, but it is common to feed them automatically, and I have here shown the lower end of a chute 2 adapted. to deliver the covers or caps in orderly succession onto the table-like top 1 of the main frame or to a guideway carried thereby. This chute is provided with an escapement 3 at its lower end which permits one cover or cap at a time'to slide'from the lower end of the chute and into engagement with a reciprocating feed member 4which is actuated in properly timed relation by driving mechanism of usual character," not shown, and which advances the cover along the table top 1, or the guideway, into compound-receiving position.

At its right-hand side, as viewed in Figs. 1 and 2, the machine frame has an upright member 5 supporting a table 5 which carries the essential elements of the no-cover, no-compound mechanism hereinafter more fully described. The table 5 also supports a pair of brackets 6 providing bearings for a shaft 7 having a sprocket wheel 8 at one end which receives a sprocket chain passing downwardly and about a sprocket wheel 9 on the main drive shaft 10, the latter being mounted in suitable bearings carried by the main frame 1. The shaft 10 is also provided with a sprocket wheel 11 driving a chain 12 which engages a sprocket wheel 13 on a shaft 14 journaled in'the main frame. The shaft 14.- actuates mechanism of usual character, not shown, for operating the es'capement, the cover-feeding device, the chuck, and the cover delivery means.

The main frame 1 is provided with suitable guides for a vertically reciprocating and rotating chuck 15 of usual type, which is raised and lowered intermittently while continu-- ously rotated by the mechanism just referred to. The upper surface of this chuck is normally substantially flush with the upper surface of the table 1 or guideway alonewhich the covers orcaps are advanced by the feed device 4, and this chuck is provided with an axial cavity or recess'16 in its upper surface adapted at times to receive the chuck-pad, hereinafter more fully described, and which constitutes the actuating means for determining delivery of lining compound to a cover resting upon the upper surface of the chuck.

An adjustably supported nozzle 17, having a delivery nose 18, is disposed above the chuck 15 and eccentric with respect to the axis thereof, and in such position that compound delivered from the nose 18 of the nozzle is deposited at the desired radial distance from the. center of a cover resting on and coaxial with the chuck. The nozzle 17 is provided with a controlling valve, not shown, having an actuating element 21*, and is supplied with lining compound by means of a flexible conduit19 leading from a suitable reservoir 20. Thisreservoir may be arranged at any desiredp'oint and the compound may be caused to How therefrom either by gravity or pressure, as may be preferred. The valve in the nozzle 17 is normally closed but may be opened by upward movement of a flexible wlre connection 21secured at its lower end to thevalve-actuating element and at its upper end to a sleeve member 22 adjustably secured to the lower end of a vertically sliding rod 23. The rod 23 slides in a bore in a boss 24 projecting upwardly from a base member 5 mounted on the table 5. The rod 23 is preferably .provided with a stop collar 25 normally bearing against the upper surupper end with spaced fixed collars 26 between which is positioned the forked end 27 of a lever 28. This lever isfulcrumed upon a pin 29 mounted in spaced ears 36 at the upper end 6f a vertical rod 31 sl1d1ng in a guideway in a boss- 32 pro ecting up from the base member 5". The lever 28 has also an arm 33 which extends to a point below the shaft 7 and which is provided with a cam fol,-

lower roll which engages a cam 34 oil the shaft 7. A pin 35 engages the under surface of the arm 33 ofthis lever, such pin sliding in a bore in a boss 36 carried by a bracket 37 projecting from the base member 5*. The pin 35 rests upon a coil spring 35 which urges the pin upwardly and thus keeps the cam follower roll of the arm 33 constantly in engagement with the cam 34. Under normal conditions the lever 28 fulcrums about its end 27, and as the cam 34 rotates and depresses the rear end of the lever, the rod 31 moves freely downward in 1ts guldeway and thus the downward movement of the arm 33 of the lever fails to lift the rod 23 and to open the valve in the nozzle 17. i

The boss 32 is provided with bearings for a transverse shaft 40 carrying a dog 41 which, under certain conditions, is swung beneath an abutment 42 carried by the rod 31. When the dog 41 is placed beneath the abutment 42, the dog constitutes a stop preventing downward movement of the rod 31; and then, when the lever arm 33 1s moved downwardly by the cam 34, the lever 28 fulcrums about the pin 29, thus raising the forked end 27 of the lever and lifting the rod 23, thereby opening the valve in the nozzle and permitting delivery of lining compound.

On the shaft 40 there is pivoted for limited downward movement a weighted member 43, and a spring 44 is interposed between the 3 members 43 and 41 sothat upward movement of the member 43 resiliently urges member 41 in a clockwise direction, as viewed in Fig.

2, so as to place it beneath the abutment 42 On the other hand, the weighted member 43 normally tends to swing the member 41 in the opposite direction. The member 43 rests upon an upwardly bent arm 45 of a pin 46 projectinghoriz'ontally from one end of a lever 47 fulcrumed at 48 upon a suitably fixed part carried by the base member 5 A fixed stop 45 -may be provided for supporting the weight of the parts 43, 45 and 46 in their normal position, as shown in Fig.. The lever 47 has a second arm 49 hereinafter further referredito. 4 Y

The base member 5" is furnished with a hollow-upstanding boss or housing 50 having a verticalslot 51 in one side and provided with a cover 52 having an axial guide opening for the upper part 53 of the two-part stem of an actuator in the nature of a feeler or detector, and which hereinafter, in accordance with the usual nomenclature of the art, will slide vertically in a bushing 55in the base member 5 and carries the chuck-pad 56 at its lower end. I

The upper stem pa-rt53 is provided at its lower end with the top element 57 of a cage having the lower part 58 and which is disposed within the cavity in the boss or housing 50 and which has an axial guide opening in its bottom for the reception 6f the upper end of the lower stem part 54. The stem part 54 is provided with a fixed collar (preferably the inner. race of a ball bearing 59) at a point within the cage 58, such collar (Tball bearing constituting astop to limit downward movement of the stem part 54 with respect to the cage 58, although permitting the stem. part 61 projecting out through the slot 51 in the housing or boss 50, and this bracket arm carries a pin 62 forming a fulcrum for a lever 63 having an arm which is disposed transversely across and immediately above the arm 49 of the lever 47 above described. The lever 63 is provided with a' second arm 64 which is normally held by a tension spring 64 in contact with an abutment element 65 secured to the upper end of the lower stem member 54. When the parts are in their normal position, the lever 63 is substantially horizontal and exerts little or no pressure against the lever arm 49.

The upper end of the upper stem member 53 is rovided with a flanged sleeve 66, prefera ly normally spaced from the top of the housing or boss 50, as indicated at 67 and the forked end 68 of a lever 69 is disposed between the upper and lower flanges of the sleeve 66. The lever 69 is fulcrumedv upon a shaft 70 mounted in, brackets 71 projecting up from the base 5,and; this lever is furnished with a rearwardly extending arm 72 provided with a cam follower roll 73 engaging a cam 74 on the shaft 70. A strong spring 69* engaging the arm 69 holds the cam followber 79 which is normally disposed above the plane of movement of the covers or caps but which may be lowered into the path of the ad- .vancing cover or cap. Thestop 79 is-pref erably adjustable with respect to the.bracket 78 as by means of a bolt 7 8 passing through an elongate slot in the stop and engaging a screw-threaded opening in the bracket so that it may be adapted for use with covers or caps of different diameters, and it is normally so adjusted that when an advancing cap or cover arrives at compound-receiving position where it is coaxial with the chuck 15, it will engage the stop and thus be positively stopped. A spring 80 tends to lift the rod 77 and normally holds the stop member in inoperative position. The upper end of the rod 77 is provided with an arm 81 carrying a cam follower roll engaging a cam 82 on the shaft 7 I I The main frame 1 is provided witha panof sliding rods 83 having cover-engaging fingers 84 at their ends adapted at the proper time in the cycle of operations to engage a cover resting upon the chuck 15 .and to remove the cover from the chuck.

The operation of the above mechanism is substantially as follows, having reference particularly to Figs. 4 to 9 inclusive as lndicating the cycle of operations:

Referring to Fig. 4, the chuck 15 is in 1ts lowermost position with its top substantially flush with the upper surface of the table 1 or guideway along which the covers are moved; the chuck-pad or actuator 56 is in its lowermost position, spaced just above the upper surface of the table or guideway; the valve in the nozzle 17 is closed; and the stop member 79 is in its upper or normal position. Assuming now that a cap or cover has been delivered from the chute 2 by the operation of the escapement 3, such cap or cover is engaged by the feed device 4 and advanced toward the chuck 15. As the cover nears the chuck, the

the position shown in Fig. 5, where it is sufli; ciently above the upper surface of the chuck to permit a cap or cover 0 to pass freely beneath it, even though such cap or cover have a deep edge or rim. At substantially the same time, the cam 82 depresses the rod 77, thus placing the stop 79 in the path of the advancing cover. As above stated, the stop is so adjusted that when the cover engages it, the cover is substantially coaxial with the chuck 15. After the cover has thus been placed over the chuck and brought to rest, the continued rotation of the shaft 7 and the cam 74 permits the lever 69 to return to its normal position, thus permitting the chuck-pad 56 to drop back to its normal position, as shown in Fig. 6. In this position it may be in contact with the central panel of the cover or spaced slightly above the latter as may be preferred.

The chuck 15 is now elevated in the usual manner to the position indicated in Fig. 7, and as the chuck rises, the cover presses upwardly against the chuck-pad 56, thus lifting the stem part 54. Since the lever 69 is at this time held in its lowermost position by the heavy spring 69 the upper member 53 of the stem does not partake of the upward movement of the lower part 54, and the collar 59 on the lower part moves upwardly in the cage 58 compressing the spring 60. This relative upward movement of the stem 54 with respect to thecage 58 causes the abutment member 65 to elevate the lever arm 64, thus depressing the lever arm 63 and pushing down the arm 49 of .the lever 471 The pin 46 is thus elevated and its bent end 45 lifts the weighted member 43 and swings the dog 41 beneath the abutment 42. Immediately thereafter the rotation of the cam shaft 7 brings the active portion of the cam 34 into engagement with the follower roll on the lever arm 33, thus lifting the arm 28, elevating the rod 23, fiid through the connection 21 opening the valve in the nozzle 17. The lining compound is now delivered from the nozzle as the rotation of the chuck 15 rapidlyturns the cover, and an annular band of lining compound is laid upon the inner surface of the cover at the desired radial distance from the center of the, latter, such distance being determined by proper initial adjustment of the nozzle 17.

After the cover has made a predetermined I number of rotations, the chuck 15 descends, and during this downward movement the spring 60 pushes the stem member 54 and the pad 56 down so that the pad remains substantially in contact with the cover. During this downward movement of the stem member 54, the lever 63 is restored to its normal position by the spring 64*, permitting the lever 47 to resume its normal position, and when the cam 34 releases lever arm 33, the weighted member 43 drops back to substantially horizontal position, swinging the dog 41 out from beneath the abutment 43 and thus permitting the rod 23 to descend and close the valve in the nozzle 17.

At some time during the above sequence of operationsthe cam 82 has permitted the spring 80 to restore the stop member 79 to its normal inoperative position so that it will not interferewith the proper removal of the lined cover or cap from the chuck.

The chuck, cover, and pad now occupy substantially the position indicated in Fig. 8, and in order that the cover may be removed, from beneath the pad, the pad is again lifted to the position shown in Fig. 9 by the'aetion of the cam 74. Vhile the pad is in the position indicated in Fig. 9, the rods 83 advance and their fingers 84 engage the lined cover and remove it from the chuck, whereupon the pad 56 again descends and the parts assume the position indicated in Fig. 4.

The above normal cycle of operationsocsition indicated in Fig. 10. In this case the upward movement of the chuck does not raise the pad 56, the latter being received in the cavity 16 in the chuck,-and thus there is no relative movement of the stem parts 53 and 54 and no such actuation of the lever 63 as is necessary to initiate delivery of lining compound from the nozzle. Thus, whenever the mechanism fails to deliver a cover to the chuck, no lining compound is delivered from the nozzle even though tlie actuating cams continue to rotate, itbeing noted that rotation of the cam 34 has no effect upon the valve actuating rod 23 unless the dog 41 has first been placed beneath the abutment 42.

\Vhile I am aware that various elements of the above mechanism are old and well known, particularly those parts which have been referred to asthe no-cover, ,no-com pound mechanism, I have believed it necessary to describe many-of these parts in detail in order more clearly to indicate the novel function and purpose of my present improvements. Furthermore, while I have shown these improvements as applied to a specific type of v no-cover, no-compound mechanism, I believe that'it is possible that the principle of the invention may be applicable to no-cover', no-compound mechanisms of other types, and I do not wish to limit myself to its application, in so far as its broad principle is concerned, to A the particular mechanism herein disclosed. P

I further contemplate that various changes in design,proportion of parts, and relative arrangement of the parts herein disclosed, and the substitution of all known or useful equivalents may be made without departing from the spirit of. the invention.

I claim: I

1. Apparatus of the class described having a no-cover, no-compound mechanism including a vertically movable chuck-pad Which moves in response to upward pressure of a cover thereagain'st and thereby initiates delivery of lining compound, said apparatus comprising means for lifting said pad above it's normal position to permit a deep-rimmed cover to advance horizontally beneath it.

2. A cover lining apparatus of the kind having a no-cover, no-compound mechanism including an actuator which moves from a normal inoperative position in responseto the pressure of a cover thereaga-inst, said apparatus comprising means for moving the actuator out of the path of the cover as the latter advances toward compound-receiving position.

3. Apparatus of the class described having a no-cover, no-compound mechanism including a chuck-pad whose normal function in response to pressure of a cover thereagainst is to initiate delivery of lining compound, said I apparatus comprising means for moving said pad, without thereby initiating delivery of means for delivering lining compound and an actuator movable by pressure of a cover thereagainst to initiate delivery of lining compound to the cover, and means for advancing the cover in a predetermined path to a compound-receiving position and'for removing a lined cover from saidposition,

said apparatus comprising means for moving the actuator out of the path of the cover without operating the compound delivery means as the cover advances to compoundreceiving position.

6. Apparatus of the class described having a nd-cover, no-compound mechanism including a movable chuck-pad whose normal function in response to pressure exerted by a moving cover is to initiate delivery of l 1ning compound, said apparatus comprising means for moving said pad, without thereby initiating delivery of compound, both before and after its normal functioning, whereby to permit a cover to be placed-beneath the pad and to be removed from beneath the pad, respectively.

7. Apparatus of the class described having means for delivery lining compound and an actuator engagea-ble with a cover and by pressure of the cover thereaga nst movlng from a normal inoperative position to initiate delivery of living compound to the cover,'and means for advancing the cover in a predetermined path to a compound-receiving pos1- tion and for removing a lined cover from said position, said apparatus compr sing means for moving the actuator out of the path of the cover without operating the compound delivery means, as the cover is removed from compound-receiving pos1t1on.

8. Apparatus of theclass described having a no-cover, no-compound mechanism including a movable chuck-pad whose normal function in response to pressure exerted by a moving carrier is to initiate delivery of lining compound, said apparatus comprising means for moving said pad, without thereby 1n1t1ating delivery of compound, to admit a cover beneath the pad and to permit the pad to return to its original position ready to perform its normal function, andmeans operative,

after the pad has functioned to initiate and terminate delivery of lining-compound, for again lifting the pad without initiating delivery of compound whereby to perm1t the cover to be removed from below the pad,

Ill)

9. Apparatus of the class described having means for delivering lining compound and.

. cover thereagainst initiating delivery of lining compound to the cover, means for advancing the cover in a predetermined path to a compound-receiving position and for moving a lined cover from said position, said apparatus comprising means for moving the actuator out of the path of the cover, without operating the compound delivery means, as the cover advances to compound-receiving position and again as the lined cover is remoi ed from said position.

10. A cover lining apparatus of the kind having a vertically movable rotary chuck for supporting a cover while being lined, means for advancing a cover horizontally onto the chuck while the latter is stationary and in its lowest position, and a no-cover, no-compound mechanism for delivering lining compound to a cover on the chuck, said mechanism including a movable chuck-pad adapted to initiate delivery of compound by pressure thereagainst of a cover resting on the chuck as the latter moves upwardly, said apparatus comprising means for shifting the chuckpad from normal position to permit a deep rimmed cover to advance beneath it and for permitting the chuck-pad to resume its normal position as the cover comes to rest on the chuck.

11. Apparatus of the class described having a vertically movable chuck-pad, a reservoir for lining compound, a valve for determining delivery of compound from the reservoir, and valve opening means which becomes operative when the chuck-pad moves upwardly in response to pressure of a cover thereagainst, said apparatus comprising means for lifting the chuck-pad, the valve operating means being unresponsive to elevation of the chuck-pad by said lifting means.

12. A cover lining ap aratus of the kind having a vertically mova le rotary chuck for supporting a cover while being lined, means for advancing a cover horizontally onto the chuck and for removing a cover from the chuck while the latter is stationary and in its lowest position, and a no-cover, no-compound mechanism for delivering linin compound to a cover on the rotating chuc said mechanism including a vertically movable chuck-pad above the chuck, said pad being adapted to initiate delivery of compound by pressure thereagainst of a cover resting on the chuck as the latter moves upwardly, said apparatus comprising means for lifting the chuck-pad to permit a deep riinmed cover to advance onto the chuck without engaging the chuckad.

13. cover lining apparatus of the kind having a nozzle for delivering lining compound to a cover and an actuator for determining delivery of compound from the nozzle, said actuator being movable along'a pre determined path and moving in response to pressure of a cover thcreagainst, thereby ini tiating delivery of compound, and means for advancing a cover along a path substantially perpendicular to and intersecting the path of the actuator, said apparatus comprising means for moving the actuator away from the path of the cover as the cover approaches the intersection of said paths.

14. A cover lining apparatus of the kind having a nozzle for delivering lining compound to a cover and an actuator for determining delivery of compound from the nozzle, said actuator being vertically movable and moving in response to upward pressure of a cover thereagainst to initiate delivery of compound, and means for advancing a cover in a substantially horizontal path intersecting the path of\ the actuator, said apparatus comprising means for lifting the actuator above the rim of the advancing cover to permit said rim to pass beneath it and for dropping the actuator as the central part of the cover reaches the intersection of said paths.

15. Apparatus of the class described having a rotary vertically movable chuck, cover advancing means, a stop device, compound delivery means, a vertically movable chuckpad disposed above and normally adjacent to the chuck, said apparatus comprising means for lifting the chuck-pad from the chuck, means for advancing acover onto the chuck, means for placing the stop in position to check the cover when the cover is centered on the chuck, means for dropping the chuckpad to normal position, means for raising the chuck with the cover and thereby lifting the chuck-pad, means for initiating the delivery of lining compound in response to this up ward movement of the chuck-pad, means for rotating the chuck, means for stopping rotation of the chuck and allowing it to descend with the cover and chuck-pad, means for stopping delivery of compound in response to descent of the chuck-pad, means for removing the stop from the vicinity of the cover, means for lifting the chuck-pad, means for removing the cover from beneath the chuckpad, and means for allowing the chuck-pad to return to normal position.

16. Apparatusof the class described having a no-cover, no-compound mechanism including amovable chuck-pad, said chuck-pad havinga supporting stem comprising relatively movable arts, means for moving all of the parts of t e stem as a unit whereby to remove the pad from normal position, one of said parts moving relatively to the other 'when the pad is subjected to pressure, thereby initiating delivery of lining compound.

17. Apparatus ofthe class described having a no-cover, no-,compound mechanismin:

' a unit, the lever remaining inoperative dureluding a vertically movable chuck-pad proing means for delivering lining compound,

said apparatus comprising a vertically movable stem having relativel'y movable upper and lower parts, a chuck-pad attached to the lower end of the lower stem part, a sleeve-like member' carried by the upper stem part, said sleeve-like member embracing the upper end of the lower stem part, a stop element on the lower stem part disposed within the sleeve like member to limit separation of the stem parts, a lever fulcrumed-on the sleeve-like member and having an arm engaging the lower stem part, said lever rocking when the lower stem part moves relatively to the upper stem part and thereby initiating delivery of lining compound, and means engaging the upper stem part for liftingboth stem parts as ing such lifting movement.

19. Apparatus of the class described having means for delivering lining compound, said apparatus comprising a vertically movable stem having relatively movable upper and lower parts, a chuck-pad attached -to the lower end of the lower stem part, a cage carried by the upper stem part, said cage receiving the upper end of the lower stem part, said upper end of the lower stem part having an enlargement disposed within the cage to limit separation of said parts, a compression spring within the cage tending to separate the stem parts, a lever mounted upon the cage, a spring tending to hold one arm of the lever in contact with an abutment carried by the lower stem part, the lever having a second arm normally disposed in such operative relation to compound delivery means that tipping of the lever by upward movement of the lower stem part relative to the cage results in delivery of lining compound, and means engaging the upper stem part for lifting the latter with its cage and the lower stem part as a unit, the

lever remaining inoperative. during such lifting movement.

20. A cover lining apparatus of that kind having means for supplying lining compound to the cover, said means including an element which responds to the pressure of a cover thereagainst and by .such response initiates delivery of the compound, means for advancing a cover toward compound-receiving position, a stop. normally disposed out of the path of the advancing cover, and means for moving the stop intoposition to check the cover when the latter arrives at compound-receiving position.

21. A cover lining apparatus of that kind having means for supplying lining compound to the cover, said means including an element which responds to the pressure of a cover thereagainst and by such response initiates delivery of the compound, means for advancing a cover toward compound-receiving position, a stop normally disposed out of the path of the advancing cover, and cam controlled means for moving the stop into position to ct eck the advance of-the cover and for'thereafter removing the stop from the path of the cover.

22. A cover lining apparatus of the kind havin a nozzle for deliverin linin compound to a cover and an actuator for determining delivery of compound from the nozzle, the actuator operating in response to pressure of a cover thereagainst, means for advancing a cover into compound-receiving position, and a movable stop for checking advance of the cover, said apparatus comprising means for moving the actuator out of the path of the advancing cover and for placing the stop in the path of the cover.

23. A cover lining apparatus of the kind having a no-cover, no-compound mechanism including an actuator which responds to the pressure of a cover and thereby initiates delivery of compound, means for advancing a cover toward compound-receiving position and for removing a lined cover from compound-receiving position, said apparatus comprising a stop, means for temporarily disposing the stop in the path of the advancing cover, and means for temporarily rcmoving the actuator from the path of the advancing cover.

24. Apparatus of the class described having means for delivering lining compound and a vertically movable actuator engageable with .the central part of a cover and by movement in response to upward pressure of the cover thereagainst initiating delivery of lining compound to the cover, and means for advancing a cover in a substantially horizontal path to a compound-receiving position beneath the actuator and for removinga lined cover from said position, said apparatus comprising means for lit'tin the actuator out of the path of the cover, without operating the cover in a substantially horizontal path intersecting the path of the actuator, said apparatus comprising stop means for stopping the cover when its center is substantially at the intersection of said paths, and means for lifting the actuator to such a height, as the cover approaches the intersection of said paths that it clears the rim of the advancing cover and for thereafter dropping the actuator into substantial contact with the cover while the latter engages the stop means.

26. A cover lining apparatus of the-kind having a no-cover, no-compound mechanism including an actuator which responds to the pressure of a cover and thereby initiates delivery of compound, means for advancing a cover toward compound-receiving position, and means for removing a lined cover from compound-receiving position, said apparatus comprising a movable stop normally disposed to one side of the path of the cover, and means for temporarily disposing said stop in the path of the cover and for restoring the stop to normal position before the cover removing means operates.

2?. A cover lining apparatus of the kind having a vertically movable rotary chuck for supporting a cover while being lined, means for advancing a cover horizontally onto the chuck and for removing a cover from the chuck while the latter is stationary and in its lowest position, and a, non-cover, no-compound mechanism for delivering lining compound to a cover on the chuck, said mechan1sm 1ncluding a vertically movable chuckpad above the chuck, said pad being adapted to 1n1tiat e delivery of compound by pressure thereagamst of a cover resting on the chuck as the latter moves upwardly, said. apparatus comprislng means for lifting the chuck-pad from normal position as a cover advances onto the chuck, for stopping the cover when the latteris centered on the chuck, and for permitting the chuck-pad to return toward its normal low position before the chuck reaches its uppermost position.

28. Apparatus of the class described havmg means for delivering lining compound and a verticallymovable actuator engageable With the central part of a cover and by movement in'response to upward pressure of the cover thereagainst initiating delivery of linmg compound to the cover, and means for advancing a cover in a substantially horizontal path to a compound-receiving position beneath the actuator and for removing a lined cover from said position. said apparatus comprising means for lifting the actuator out of the path of the cover without operating the compound-delivering means, as the cover advances to a position beneath the actuator, and means for stopping the cover in compoundreceiving position, and means for again raising the actuator, without operating the com pound delivery means, as the lined cover is moved from compound-receiving position.

29. A cover lining apparatus'of the kind having a vertically movable rotary chuck for supporting a cover while being lined, means for advancing a cover horizontally onto the chuck and for removing a cover from the chuck while the latter is stationary and i cover is centered on the chuck, a movable" stop device, and means for placing thestop device in the path of advance of the cover to bring the latter to rest in centered relation to the chuck.

30. A. cover.lining apparatus of the class described having a no-cover, no-compound mechanism, an adjustable delivery nozzle, a controlling element for a valve within the nozzle, a compound supply reservoir, a flexible conduit leading from the reservoir to the nozzle, and a flexible connecting element for transmitting movement from the no-cover, noecompo'und mechanism to the valve controlling element in the nozzle.

31. A cover lining apparatus of the kind having a no-cover, no-compound mechanism including a compound delivery nozzle and a detector for determining delivery of compound from the nozzle, said ap aratus comprising means for advancing a eep-rlmmed cover to an operative position relative to the nozzle, the detector being normally disposed in the path of the advancing cover, and means for displacing the detector from normal position, during advance of the cover so as to permit substantially unimpeded advance of the cover.

Signed by me at Cambridge, Massachu-

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