US1560162A - Machine for making paper-box blanks - Google Patents

Description

Nov. 3,1925. 1,560,162

J. HREN ET AL MACHINE FOR MAKING PAPER BOX BLANKS Filed July 1923 6 Sheets-Sheet J.

- mVtgvToRs JOSE/WI llm-r/v C'HRL E/sEA/L 0///? E aw WW4 PET ATTORNEYS;

J. HREN ET AL MACHINE FOR MAKING PAPER BOX BLANKS Nov. 3,1925.

6 Sheets-Sheet 2 Filed July 1925 Y Q INVENTE RS x/O EPA/ l/REN ATTORNEYS Nov. 3 1925. 1,560,162

J. HREN ET AL I v MACHINE FOR MAKING PAPER BOX BLANKS Filed July 7, 1923 s sheei'-sheet :5

ATTORNEYS J. HREN ET AL MACHINE FOR MAKING PAPER BOX BLANKS Nov. 3, 1925.

Filed July 7, 1923 6 Sheets-Sheet 4 I 1 v5 iii INVENTORS (/osEP/l HREA/ ATTORNEYS vm ww Cam. E Isa/v1. am?

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Nov. 3,1925. 1,560,162

J. HREN ET AL MACHINE FOR MAKING PAPER BOX BLANKS Filed July 7,1923 s Sheets-Sheet 5 URI INVENTORS SEPI/ RE/I/ ATTORNEYS R1. Elsa-M10116 N v3, 1925- J. HREN ET AL MACHINE FOR MAKING PAPER BOX BLANKS Filed July 7, 1923 s Sheets-Sheet s ATTORNEYS Patented Nov. 3, 1925.

UNITED STATES PATENT. OFFICE.

JOSEPH HREN, OF KINGSTON, NEW YORK, AND CARL EISE NLOHR, OF NEWARK, NEW

. JERSEY.

MACHINE FOR MAKING PAPER-BOX BLANKS.

Application filed my 7,

To all whom it may concern:

Be it known that we, JOSEPH HlinN and CARL EISENLOHR, both citizensof the United States, and residents, respectively, of Kingston, in the county of Ulster and State. of New York, and Newark, in the county of Essex and State of New J ersey', have invented certain new and useful Improvements in Machinesfor Making Paper-Box Blanks, of which the following is a specification.

The principal object of this invention is to improve upon the construction of a machine disclosed in oulr prior Patent No. 1,293,782, granted Feb. 11,1919, which ma chine is of the type wherein the blanks are constructed of three separable sheets of material which are fed to and secured together by the machine thereby avoiding the waste formerly caused by the manufacture of the blanks out of a single sheet of material.

Considered in its more specific aspects the invention consists in the following further improvements upon the construction of the machine disclosed in said patent. 1. Improvement of themeansfor feeding'the sheets from the sheet-holding means to the presser mechanism. 2. Improvement ofthe glue applying and feeding structure. 3'. The provision of means to automatically stop the actuation of the presser mechanism upon a failure of the feeding means to feed a sheet. .4. The provision of means to automatically stop theactuation ofthe presser mechanism if more than one sheet is fed at the same time from any one of. the sheet magazines. 5. Improvement and simplification of the side and central sheet jogging and registering means. 6. The inclination of the machine to cause the sheets to fall under the influence of gravity from the feeding means between the presser mechanism and bed plates. 7. The improvement of the sheet stopping means. 8. The provision of means to prevent rebounding of the sheets after theyengagethe sheet stopping means. 9. The provision of means to eject the finished blanks from the machine. 10. The provision of anti-friction means to prevent undue wear upon the pressers and the actuating cams thereof by providing a rolling frictional contact means.

1923. Serial Nb. 650,024.

Forthe accomplishment ofthese and such further objects as will be apparent to those skilled in the art to which this invention appertains, the invention consists of the following construction, combination and arrangement ofparts hereinafter specifically set forth and illustrated in the accompanying drawings forming a part hereof, wherein is shown an illustrative embodiment of-our invention, but it will be understoodthat such changes, variations and modifications may be resorted to as fall within the scope of the claims hereunto appended.

In the drawings l Fig. 1 is a side view of our improved ma chine; Fig. 2 is a vertical section on the line 22 of Fig. 3; Fig. 3 is a vertical sec tion on the line 33 of Fig. 2; Fig. 1 is a horizontalsection on the line H of Fig. 2; Fig. 5 is an enlarged detail in side elevationof the center sheet feeding mechanism showing "the feed: at the beginning of its feeding stroke; Fig. 6 is a view similar to Fig. 5showing the feeding mechanism at the end of its stroke; Fig. 7 is a horizontal section on the line 7-4 of Fig. 6; 8 is a sectionaldetail of the glue feeding and applying device; Fig. 9 is a section on the line 99 oft-Fig. 8; Fig. 10 is a section on the line 10-10 of Fig. '3 showing the inoperative position of the parts for actuating the sheet stopping means; Fig.;11 is a view similar to Fig. 10 showing the operative position of the parts;Fig. 12 is an enlarged detail of the centre sheet joggers and the means for actuating said joggers; Fig. 13

is a section on the line 13-13 of Fig. 3

Fig. 14 is a section on the line1t14 of Fig. A andjFig. 15 is an enlarged detail of the-automatically operated stop clutch.

As shown in the drawings the numeral 20 indicates the main side frames of the machine, the bottom parts of which are extended to form a, substantial floor engaging surface and the upper portion 21 of which extends in a rearwardly inclined direction asclearly shownin Figs. 1 and 3. The upper portion21 of each ofthe side frames is provided with a rectangular cut out portion 22 to the top of which is secured an auxiliary frame 23 having a forwardly projectingarm 23 to which is secured a plate block block 23 which forms the rear ofthe centre sheet magazine. Suitably secured to the front of the upper frame portions 21 is a pair of brackets 24 which support thefeed magazines and feeding mechanism.

Sheet mag'aenes and feeding mechanism.

A pair of transversely extending sup porting rods 25 are secured, as by the knee brackets 25, to the upper face of the brackets 23 adjacent the front and rear thereof, and a plurality of sheet supporting rails 26 extend between the supportingrods 25 adjacent'the centre thereof to form ja'supporting surface for the'central sheets Slidably mounted on the-rods 24 are a pair of plates 27 having the nuts 28 secured to their 'under faces forengaging the screw 29, by means of which theposition of the plates may be adjusted. Extending upwardly from and secured to-each of the plates 27, a short distance inwardly from 'its inner'edge, is a side plate 30, which defines the sides of the central sheet magazine, the central sheets resting upon the inner edges of thepl'ates '27 and the sheet supporting rails '26.

Adjustably mounted on each plate 27, as by means of the brackets 31, having the elongated slot'32 therein, is an outer side plate 33 whiclfwith the side plates and the plates 27 defines the 'magazine for the side wings B of the tripartite bl'ank,a' suitable wing nut 34 being providedto secure the plates 33 in adjusted positions. Each plate 27 is provided with an elongated slot '35 in each of which slots and between the rails 26 a sheet feeding device, "indicated generally by the numeral'36, is mount-ed.

Secured to the under face of each plate 27 adjacent the outer edge thereof is a guide bracket 37, in which are slidably mounted the outer ends of a crossrod 38, provided with a pair of downwardly projectingapertured bosses 39 'to which the crank rods 40 are connected. Cranl'rrods 40 aredriven by crank discs 40 secured upon-a crank shaft 62 to be presently described. Eachfeeding device 36 consists of a lower bl0ck'41, (see Figs. 5, 6 and 7'), secured as by the clamp 42 to cross'rod 38 and connected to each 41, as by the links 43, is an upper 44 provided at its front-'e'ndWith a plurality of upwardlye'xtendingteeth 45 adapted to engage with thesheets to "be" fed.

The rear end of upper block 44 hassli'dably mounted therein a pair of spring pressed shoes 46 which are adapted,' when the "feeding device 26 is moved froinitheposition shown in Fig. 5 to theposition shown in Fig. 6, to engage "with the restricted portions 48 of the slots 35 and-a similar'restri'cted portion between the rods 26 and move the upper block 44 from'its operative'to its inoperative position. 'VVhen the shoes 46"ar'e in the restricted portions 48 the braking effeet thereof will cause the upper block to move to the position shown in Fig. 5 to cause the teeth 45 to engage with the under face of the sheet and force it outwardly to be engaged by the cooperating feed rolls 49.

. Driving meoiwmism. c

end'of main shaft is sesprocket wheel 57 secured to mainshaft 50 v drives a sprocket chain 58 which is trained about a sprocket 59, secured to the shaft 49 upon which lower feed rolls 49 are secured,

and alsoabout'another sprocket 60 secured to a transverse shaft 61.

.A cam shaft 62 is driven from the pressure shaft 55 by means ofs'uitable sprockets andchain 63.

Glue applying device.

Slidably mounted in suitably apertured W lugs 64 65 projecting rearwardly from the plate-is a pair "of hollow pipes or tubes 66 havingsecuredto their upper ends the glue pots67. Each of said tubes is widened whichfis rotata'bly mounted in the elongated grooves 70-providedin the inner walls of the tube,'whereby the periphery of feeding wheel '69 will rest by gravity upon and will be driven by contactwit-lr'a toothed glueapplying jwheel 71"rota-tably mounted upon shaft 49 'upon'whiclr the upper feed-rolls 49*are secured. A'valve 66 is'mounted in each tube for controlling the-flow of glue "from the glue pots 67 to the delivery spout '68. It" will "benoted that the'tubes-66 with their-associatedparts rest by gravity upon the wheels 71 thereby causing the wheels 71 spout. Sheet tmhsfefl'ing registering mecha A box-like framestru'ctu re 75 is resilient- 1y supported upon the lower faces 'of the cut out portion 22 by means of the springs 76 and extends transversely across between theframe 20, bolts 77 acting to retain the 83 are provided with the threaded bosses 84 engaging the screw 79 by means of which the brackets 82 may be adjusted transverse" ly of the machine. Secured to the outer side of each of the plates 88 adjacent the top thereof, is a table 85, in the vertically eX- tending' side flanges 85 of which the transfer rolls 86, (see Figs. 4 and 14) for the side sheets B are rotatably mounted, the front one of said rolls being rotated by the chain 87 from the lower shaft 49 of lower feed roll 49 and the rotation being transmitted to the remaining transfer rolls by the gear ing 88. A oo-operating rotatably mounted pressure roll 91 is provided for each of the transfer rolls 86, said pressure rolls being held in yielding engagement with the transfer rolls by springs 92, seated in suitable pockets in a removable frame 98, detachably secured to the table 85 in any suitable man ner. A grooved guiderail 94 is secured to the inner face of each flange 85 and projects forwardly towards the feed rolls 49 to guide the central sheets from the magazines to the pressure mechanism to be hereinafter described. Each table 85 has an upwardly and transversely extending portion 95 provided. with a dovetailed guide 5 in which the pressure 96 to be hereinafter described are slidably mounted. Slidably mounted in suitable bearings in the portion 95 is. a rod 97 upon which the side sheet joggers 98 are adjustably secured. Aslide 100 which is connected to the rod 97 by means of a bracket 99 is slidably mounted to the under surface of the table by means of a plate 101, said slide being provided with an elongated slot 100? in which the anti-friction rollers 102 are received. The inner end of each slide has depending therefrom a roller 108 which engages within a cam groove 104 in cam 105 secured to cam shaft 62.

The joggers for the central sheet A eonsist of a lever 106, (see Figs. 2 and 12) pivotally mounted as at 107, upon the portion 95 of table 85, said lever having an upper arm 106 adapted to be engaged by a button 108 projecting from the outer face of the presser .96, and the lower arm 106 of said lever is tapered as at 106 to guide the side sheets B under the lever. A spring 106 is provided to normally hold the levers 106 in an inclined position. Slidably mounted upon the inner face of each bed plate 83 by means. of the bracket 109 1s a rail 110 springs 111 (see Fig. 2) being provided to normally. hold the rail inthe upper position 1 shown in Fig.3.

Means are provided for stoppingand holding the sheets untllthe pressers 96 have been actuated and sald means comprise the lever' 112,' one end of which is pivotally mounted, upon a shaft 113 secured inbosses 114 depending from the bottom of table 85,

a torsion spring 115 being suitably anchored to the shaft and lever to normally hold the lever in elevated position! The other end oflever 112 is extendedilaterally to form the arm 112 and is provided with an elongated slot-112 in which a stop 116 for the central sheet A is adjustably secured. Intermediate its ends the lever 112 is provided with a second laterally extending arm 112 provided with an elongated slot 112 in which is secured a stop 117 for the side sheets B. Means are provided for moving the levers 112 upon their pivotsto lower the stops 116 and 117 and comprises a trigger 118 (see Figs. 10 and 11) pivotally mounted upon each of the rails 110, one

end of said trigger being adapted to engage with a small lug 119 projecting rearwardly from bed plate 83 when the rails are depressed, and the other end of the trigger 118 engages a lever 120 also pivotally mounted upon the rail 111 to cause said lever to be moved from the position shown in Fig. 10 to the position shown in Fig. 11, lever 120 engaging the top of lever-112 to move it downwardly and thus move the stops 116 and 117 to inoperative position. 1 r I i Each of thetop feed-rolls49 is mounted in a swinging frame 49 which is urged by the: spring 49 to hold the top roll yielcL ingly towards the.bottom'roll 49, suitable stops being provided to hold the top roll from contacting with the bottom roll, the top roll only rotating during thepassage "of a sheet. It will be noted by referring to Fig; 2 that the lower end of plate 23 terminates a distance from the rod 26 and plates 27 just suflicient to permit the passage of a single sheet. 8 i

i Presser mechanism.

Secured upon the pressure shaft 55 is a pair of cams 121 (see Figs. 2, 3 and 13) which engage'within an opening 122 in the upper end of the pressers 96, suitable collars 123 being provided to prevent movement of the cams longitudinally of the shaft 55. g It will be noted that the cams 121 are of sufficient length to permit transverse movement of thepressers when the for different sized blanks.

Slidably monnted upon the lower face of the opening 122 is a roller cage 124 having the rollers 125 therein, plate 126 being secured to the sides of the pressers to prevent longitudinal movement of the rollers and parts are adjusted --125 and plates 12? respectively, to the right in Fig. 13. Pressers 96 are provided with a: dovetailed .web 96 to engage slidably within the dovetailed guide 95 herei'nbefore mentioned, which causesthe pressers to be held in alignment with the top face of bed plates 83. Referring to Fig.2 it will be noted that 'thepressersspread outwardly longitudinally of the machine toward the bottom edgesand that the front'lower edges of the pressers are flared upwardly as at 129 to allow. the central sheets to readily pass beneath the pressers. I

Rebound preventing tie vice.

Pivotally connected to .the rear wallof the structure as by bracket139 (see Fig. 2) is alever 131 which extends forwardly under cam shaft 62 centrally of the pressers 96 and is provided at its forward end with the yoke arms 132 between which is rotatably mounted a roller 133,which is driven from shaft 61 by means of a belt 134. Suspended above ,and in line with roller 133 for free vertical movement is a roller 135 rotatably mounted in one end of a rod 136, the other end of which is'pivoted to the arm 23 of bracket 23. Lever 131 has mounted thereon a wear plate 137 immediately below the cam shaft 62, with which a cam138 secured to said shaft is adapted to engage and force the lever downwardly at predetermined intervals, while the yoke arms 132 on the forward end of the lever are provided with the notches 139 in which the rounded end of a pivotally mounted counterweighted lever 140 is engaged to normally holdthelever 131 with roller-133 in its upper position.

Rail depressing mechanism.

While the pressers 96 would be sufficient to press the rails 110 downwardly against the action of springs 111 to bring the edges of the central sheet into contact with the glued edges of the side sheets, we have found it: preferable, in order to permit the finished blank to be readily ejected, to provide means :for'holding the rails 110 inlowered positionafter the pressingoperation is completed and for thispurpose the upper end of a link 141 (see Figs. 10 and 11) is pivotally connected substantially to the centre of each Irail. fThe lower end ofeach link 141 has secured thereto theupper end of. a curved rod 142, the *lower end of which is pivotally securedas at 143to the bed plate 83.. A cam 144 is secured upon cam shaft 62 in alignmentwith each rod 142. to engage therewith gand holdfthe' rails downwardly after the pressers 96 have started their upward movement.

Blank ejecting means.-

Secured upon the shaft 61 at the center of the machine is a roller 145 (see Fig. 2) the periphery of which is spaced below the lower face of central blank A when the rails are in their upper position, but which is adapted to engaged with the blank when the rails 110 are depressed. A roller 146 is mounted above the roller 145 upon a lever 14'? secured upon a shaft 148 rotatably supported in a bracket 149 secured to the auxiliary frame 23. the end of a lever 151 also secured upon the shaft 148 normally holds the upper roller 146 out of engagement with the central sheet and holds the forward end of lever 151 in engagement with the under face of a cam 152 mounted on the outer end of pressure shaft 56 (see Fig. 3). Cam 152'is adapted to depress levers 151, 147 and roller 146 to cause the finished blank to be ejected immediately after the pressers 96 have completed their operation.

Automatic stop mechanism.

lvfeans are provided to prevent operation of the pressers 96 in case any of the central or side sheets should not be fed thereto and said means comprise a lever 155 for each sheet (see Figs. 1, 2 and 4) pivotally mounted upon the lug 65. The forward arm 155 of each lever is curved about the upper A weight 150 provided on.

feed 'roll 49 and normally tends to rotate by its own weight into the path of travel of the sheet from the magazine to the feed rolls as shown in Fig. 1. The other arm of said lever extends rcarwardly and is adapted to be engaged at timed intervals by an arm 156, secured to a shaft'157, which is oscillated by means of an arm 158, connected by rod 159 with a link 160 pivotally mounted, as at 161, to gear case 162' Link 160 is provided with a. cam roller 163 which rides upon cam 164 and a curved rod 165 connects link 160 with a clutch actuating member 166 also pivotally mounted ongear case 162,

the end of member 166 isprovided-with a similar taper 166 adapted to engage taper 169" when member 166 is in operative position and thereby force the clutch key out 'of engagement with the recess of the gear 54, thus stopping the rotation of shaft 55.

A spring 171 normally holds member 166 in inoperative position. The rear arm of lever 155 is cut awayto provide a shoulder 155 (see Fig. 2) with which the lower end of arm 156 will engage when a sheet has not been fed. I

A second automatic stopping mechanism is also provided to stop the machine in case more than one sheet should be fed to the machine and this mechanism comprises a clutch actuating member 175, pivotally secured to the gear case 162 and connected by link 176 with a rod 177, pivoted to the main frame 20. A screw 178, mounted in a lug 179 of the structure is adapted to engage rod 177 and actuate member 175 against the action of spring 180 when the structure 75 is depressed beyond a certain degree against the springs 76. It will be understood that the hooked end of member 175 engages within groove 167 and is constructed with a tapered face to engage clutch key 169 in a manner similar to that of clutch member 166.

'General operation of the machine.

The operation of the machine is as follows: A supply of central and side sheets being placed in their respective magazines and the power being put in operation, the shafts 49 50, 55, 61 and 62 will be rotated. It will be understood that the machine will be adjusted to the proper width for the blanks by turning screws 29 and 79, by means of handle and chain 81, and also by adjusting the plates 33 and side sheet joggers 98. As the screw 79 is turned, brackets 82 will carry with them the tables 85, which in turn will carry the pressers 96 by the co-operative engagement of'dovetails 128 and 95.

Crank disc 40 is so arranged that when cam shaft 62 is rotated the feeders 36 will be actuated to pull the lowermost sheet from under its respective pile, the feeder at the beginning of its stroke occupying the position shown in Fig. 5 and the shoes 46 by their frictional contact with the restricted portions48 shown in Fig. 7 will cause the upper block 41 to move to its upper position, as shown in Fig. 5, thus forcing the teeth 45 into the sheet and pulling the sheet to the feed rolls 49. Due to the inclination of the machine the central sheets will tend to slide by gravity along the rails 110 until they engage the stops 116 while the side sheets will move between the transfer rolls 86, 91 until they engage the stops 117. As the front edge of the sheets pass to the feed rolls 49, the levers 15-5 are momentarily raised by the arm 156 to permit the passage of the sheets. The central sheet then passes between the rebound preventing rollers and is fed thereby until it engages the stop 116, while in the meantime the side Sheets are fed in the machine.

by the rollers 86, 91. During the feeding of the sheets by the rollers, the pressers 96' are moving downwardly and as the pressers engage the sheets, cams 138 and 152 are ar- It will ture of cam groove 104 is so arranged-that just as the sheets approach the stops 116, 117 the side sheet joggers 98 will be drawn inwardly by the parts 97, 99 and 100 to hold the sheets against the side faces of the railsas clearly shown in Fig. 2. action is taking place the 'p ressers 96 are being moved downwardly by the cams 121, and during the initial downward movement of the pressers the central sheet j oggers 106 will be actuated by the buttons 108 tocause the central sheet to be accurately centered Cam 144 is so constructed and positioned that it will engage the curved rod 142just as the pressers engage the central sheet and the rails 110 will therefo-rebe pulled downwardly until they are flush with the upperface of the bed plates 83 and table 85, the rails and pressers moving in unison during this time but the cam 144 holding While this the rails in lowered position until the blank is eject-ed. l/Vhen the rails have reached this position the under face of the central sheet will be in contact with the glued edges of the side sheets and just at this instant, as the pressers 96 have in the meantime continued their downward movement they will engage the top of the central sheet adjacent its side edges, and force it with considerable pres sure against the glued side sheet to securely unite the sheets and form the tripartite blank. During the initial downward movement of the pressers and until they have exerted their pressure against the sheets,there is practically no frictional resistance be- 1 the lower parts of the mechanism upon the box-like structure 7 5' which is resiliently supported by'the heavy springs 76 permits a limited movement of the pressure reacting members which will permit the pressers to be held in contact with the sheetsfor a suflicient time to cause the sheets to be firmly secured, the springs 7 6 being sufliciently. strong to furnish substantial resistance while preventing breakage.

As the rails 110 move downwardly the levers 112 carrying the stops 116 and 117 willbe moved downwardly by. the parts 118 to 120 shown in Figs. 10 and 11 andljust as the pressure upon the sheetsby the pressers 961s released, the cam 152 isarrangedtocause the lever 151 and associated. parts to move the roller 1&6. downwardly until it engages roller 145;, thuscausing the finished tlllipartite blank to be ejected from the mac 1ne Operation of the automatic stop mechanism.

-As the sheets are passing fromthe magazinespto thefeed rolls 49 the lever 155 is momentarily raised-by the. contact of thefarm l56with thelever topermit the passage of the front edgeof thev sheets; Asthe. arm 15.6 moves rearwardly and upwardly, from the position. shown .in'. Fig; 1,. itv will I reach the reduced outer. end of the lever and if a sheet hasbeen fed by, the, feeding device 36, thefo-rward arm 15 5 of the lever will'res't upon the top of the sheet and. prevent the forward end of. the, lever from. dropping, thereby preventing there-a1, end of the lever from raising and remaining in. contactwith the arm 156 when the reduced, portion, thereof is reached. If a sheet has notv been fed, the front end 155" of lever, 155 will drop, to cause the rear end 155. to remain in contact Witlrthe arm.156 during its: entire oscillation. The throwof cam .164 is arranged to cause the arm 156tobe oscillated, ust as the pressers start their downward movement, and just before the clutch key 169 reaches the clutch actuated member 166. If thelever 155 has followed the arm156 because ofthe failure of the feeding device to feed a sheet, the arm 156 will engage the shoulder 155. to prevent the forward movement of the arm, thereby holding the arm 156 and preventing the return of the. roller 163 by the spring 171 and associated parts. It will thus be understood that the clutch actuated member will be held in its operative position until itengages the key 169, thereby causing it to be withdrawn from the recess in. gear 54, and'thus stopping the rotation of pressureshaft 55 and the operation of the pressers.

If more than one sheet should be fed to the machine there would result an abnormal pressure which would move the structure downwardly against the action of springs 7 6 an undue amount thus causing screw 178 to move links- 176 and 177 and the clutch actuating member 7 5 to operative position against the action of its spring tocause the stopping of the gear 54; and shaft 55.

Vano-us changes in the specific 01111 shown and described may be made within the scope of the claims Without departing from the spirit of the invention.

l/Ve claim:

1. In a machine for making paper box blanks, a plurality of sheet holding magazines inclined to the horizontal, a pressing mechanism arranged at a greater inclination to the horizontal than said magazines and meansto feed the sheets from said magazines to said, pressing mechanism said inclination of said pressing mechanism being suflicient to cause the sheets to slide thereover by gravity after they are Withdrawn from said magazines; and stops projecting into the path of movementof said sheets to stop the sliding movement thereof when said sheets reach the proper position to be operated on by said pressing mechanism.

2. In machine blanks, a plurality of sheet holding magazines inclined to the horizontal, a pressing mecha nism arranged at a greater inclination to the horizontal than said magazines, means to operate said pressing mechanism, and means operating in. timed relationship with said pressing mechanism operating means to feed the sheets from said ma-gazinesto said pressing mechanism, said inclination of said pressing mechanism being suiiicient to cause the sheets to slide 'thereovcr by gravity after they are Withdrawn from saidimaga-zines; andstops projecting into the path of movement of said sheets to stop'the sliding novement thereof when said sheets. reach the proper position to be operated on by said pressing mechanism.

3. In. a. machine for, making-paper box blanks. a plurality of sheet holding magazines inclined to the horizontal, a pressing mechanism arranged at a greaterinclination to the horizontal thansaid magazines,means to operate said pressing mechanism, means operating. in timed relationship with said pressing mechanism operating meansto feed thesheets from said magazines to said pressing mechanism, and means to prevent actuation ofsaid'pressing mechanism when a-failwe of said sheet feeding mechanism occurs.

4. In a machine for making paper box blanks, a plurality of sheet holding magazines, a presser mechanism, a pair of. bed plates beneath said presser mechanism. means to feed the sheets from said magazines to saidbedplates, said bed plates being arranged at a sufiicient angle to the horizontal to .cause the sheets to slide by gravity over bed platesand means to stop said sheets and hold, them beneath said pressing mechanism.

5. In a machine for making paper box blanks, a. plurality of sheetholding magazines, a presser mechanism, a pair of bed plates beneath said presser; mechanism, means to feed the sheets from said magafor making paper box 6 nik zines to said bed plates, said bed plates being arranged at a sufficient angle to the horizontal to cause the sheets to slide by gravity over said bed plates, means to stop said sheets and hold them beneath said pressing mechanism, and means to prevent rebounding of said sheets when they engage said last-mentioned means.

6. In a machine for making paper box blanks, a presser mechanism, a pair of bed plates beneath said presser mechanism, a pair of rails slidably mounted upon said bed plates, means to force said presser mechanism upon said plates and means to cause said rails to move in timed relationship with said presser mechanism.

7. In a machine for making paper box blanks, sheet feeding mechanism, a presser mechanism, a pair of bed plates arranged beneath said presser mechanism, a pair of rails slidably mounted on said bed plates, said rails and bed plates arranged at an angle to the horizontal to cause the sheets to slide by gravity over said rails, stops to hold saidsheets in registry with said presser mechanism, means to force said presser mechanism against said bed plates, means to cause said rails to move in unison with said presser mechanism after said sheets have been engaged thereby and, means to move said stops out of engagement with said sheets as the sheets are engaged by the presser mechanism.

8. In a machine for making paper box blanks, a sheet holding magazine, a presser mechanism, means to feed a sheet from said magazine to said presser mechanism and means to glue the sheet as it is fed comprising a glue pot having a delivery spout secured thereto, a glue applying wheel rotatably mounted adjacent to and in contact with the mouth of said delivery spout, said glue pot and spout resting by gravity upon said glue applying wheel whereby accumulation of glue upon the mouth of said spout will be prevented and said glue applying wheel will grind a fluid tight joint upon.

the mouth of said spout.

9. In a machine for making paper box blanks, a plurality of sheet holding magazines, presser mechanism, a pair of bed plates beneath said presser mechanism, means to feed the sheets from said magazines to said bed plates, said bed plates be ing arranged at a suflicient angle to the horizontal to cause the sheets to slide by gravity over said bed plates, means to stop said sheets and hold them beneath said pressing mechanism and means to prevent rebounding of said sheets when they engage said last-mentioned means comprising a freely mounted upper roller adapted to rest by gravity upon the sheets as they pass through the machine, a lower roller, means to normally hold said lower roller in contact with the sheet and means to move said lower rollers downwardly'in unison with the final downward movement of the anism.

10. In a machine for making paper box 3 blanks, sheet feeding mechanism, a presser mechanism, a pair of bed plates arranged beneath said presser mechanism, a pair of rails slidably mounted on said bed plates, said rails and bed plates arranged at an angle to the horizontal to cause the sheets to slide by gravity over said rails, stops to hold said sheets in registry with said pressermechanism, means to force said presser mechanism against said bed plates, means to cause said rails to move in unison with said presser mechanism after said sheets have been engaged thereby and means operated by said rails to movesaid stops out of engagement with said sheets as the sheets are engaged by the presser mechanism.

11. In a. machine for making paper box blanks, a presser mechanism, a pair of bed plates, means to feed a plurality of sheets between presser mechanism and bed plates, means to apply an adhesive to said sheets as they are fed to said presser mechanism, means to cause said presser mechanism to press the glued portion of said sheets into sealing contact to form a compositeblank and means to withdraw said blank when the pressing operation is completed, comprising a lower roller and an upper roller, one or" said rollers being mounted formovement towards the other, means to normally hold said movable roller away from the other roller, and means to move said movable roller to cause the composite blank to be 'engaged therebetween after the pressing operapresslng mechunison to operative and inoperative positions.

13. In a machme for making paper box blanks, a presser mechanism, a pair of bed plates beneath said presser mechanism, cen

tral and side sheet magazines, means to feed the sheets from said magazines to said presser mechanism, means to move said presser mechanism to and from said sheets, and means operated by the movement of said presser mechanism to center the central sheets relatively, to said bed plates and presser mechanism.

14. In a machine. for making paper box blanks, a presser mechanism, a pair of bed Pr sser mechanism to and from said sheets, means operated by the movement of said presser mechanismto center the central sheets relat vely to sa d bed plates and presser mechan sm. and means operating in timed relationship with said last-mentioned means to move the edge portions of the side sheets-under the central sheets and in longitudinal; alignment therewith.

15.- Ina machine for making paper box blanks,v a pressermeehanism, a pair of bed plates, means to feed a plurality of single. sheets to SfidClxPlGSSQl' mechanism and bed plates, means to resilientlysupport said bed plates, means to move said presser mechanism to; and from said bed plates, and means to automatically stop said presser mechanismmovingmeansaetuated by the supporting means for said bed plates when said bed plates are moved by the pressure of said pressing mechanism beyond a predetermined poi t.

16. In a machine for making paper box blanks, a presser mechanism comprising a pressure shaft, a presser freely supported by said shaft, a bed plate supported beneath saidpresser, a rota-table cam mounted on said shaft in engagement with said presser to, reciprocate said presser and anti-friction means between said presser and cam.

17. In a machine for making paper box blanks, a presser mechanism comprising a pressure shaft, a presser freely supported by said shalft, a bed plate supported beneath saidpresser, a rotatable cam mounted on said shaft in engagement with said presser to reciprocate saidvpresser and anti-friction means between said presser and cam comprising a plate mounted for reciprocation on said presser constructed and arranged to provide a rolling frictional contact with said cam whensaid presser is forced against said bed plate.

18. In a machine formaking paper box blanks, a presser mechanism comprising a pressure shaft, a presser freely supported by said shaft, a bed plate supported beneath said presser, a rotatable cam mounted on said shaft in engagement with said presser to reciprocate said presser and anti-friction means between, said presser and cam comprisin a plate, anti-friction means between said presser and plate, and resilient means to. normally urge said plate and anti-friction means in a direction opposite to the movement of said cam across said plate.

19. In a machine for making paperbox blanks, a presser mechanism, means to feed a plurality of sheets to said presser mechaaisnzi,meansv to actuate said presser mechanism and means. to automatically stop the operation of said presser mechanism actuat ing means when said feeding means fails to feed a sheet, comprising a two-armed pivot ally mounted lever, one arm of said lever being provided with a stop shoulder, an osciliating arm adapted to engage with said shoulder, a clutch interposed in said presser mechanism actuating means and connections from saidoseillating arm to said clutch to cause said clutch to be thrown to inoperative position when said arm engages said shoulder.

JO SEPH, HREN. CARL. EISENLO-HR.

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