US1723737A - Can body-forming wings - Google Patents

Description

Aug. 6;, 1929. P. kRusE cm nomr FORMING vmws Filed Aug. 3, i192! III/A! INVENTOR By Attorneys, @"mmm L Patented Aug. 6, 1929.

PETER KRUSE, OF BROOKLYN,

NEW YORK, IN.

NEW YORK, ASSIGNOR T0. 33. W. BLISS COMPANY, O]?

Y., A CORPORATION OF DELAWARE.

CAN BODY-FORMING WINGS.

Application fled August 3, 1927. Serial No. 210,373.

This invention relates to improvements in can body-forming wings which are used in can making machinery to wrap a body blank around a forming horn.

a The object of this invention is to provide improvements in body-forming wings with a view to speeding uptheir actionfso that the body-making machines can be run at higher speeds without overstressing the in wings and parts associated therewith.

A further object of the invention is to.

- provide body-forming wings which effect the forming of a can body with a considerably smaller movement of the wing-actuatie ing members than in devices hitherto known. 1

v The inventio further aims to provide substantially constructed oscillating wings having comparatively light weight portions ac movable with respect to the main wing por tions and mechanicall controlled in such manner that the said ight weight portions peritorm a part of the function of wrapping the can body blank around the horn, thereby cutting down the required movement of the heavier main wing ortion.

Further objects the invention will be apparent from the following detailed description in which reference is had to the an accompanying drawings, wherein Fi ure l'is a side elevation of the body- A forming wing according to the present invention.

Fig. 2 is a view of the device shown in as Fig 1 taken from below.

ig; 3 is an end view of the mechanism shown in Fig. 1, certain portions having been broken away to show internal details.

' The wings are shown in full lines in their 40 closed position and one of the wings in dotted lines in its open position.

Fig. 4 is a longitudinalcross-section taken along the line IV-IV of Fig. 3.

In the designof modern can making machinery the effort is constantly made to increase the safe working speed so that maximum production may be had from each unit. Many can body have already gone into use in are turned out at the rate of considerably more than 300 per minute. At such eds various elements of the machines whic are machines requiredto execute reciprocating or 050111??- lhese wings must which can bodiestory movements Vere stresses due are subjected to rather seto the very rapid accelerations necessaril involved. This is particularly true of t e can body-forming wings, the function of which is to bend the fiat body blank around the forming horn. be lifted or swung away from the horn a sufficient distance to permit the flat blank to be fed onto the horn and tangent thereto. The wings are then swung toward the horn, carrying the free edges of the blank completely around the horn and slightly beyond so that the marginal hooks which have been previously formed in the body blanks may be interlocked to 'form the cylindrical can body. According to usual practice, wings made in a single piece are utilized and the move ment of such wings in their entirety must be sufficient to swing clear of the sheet or body blank as it is fed into position overthe horn, and upon the reversemovement to wrap the blank around the born, as above set forth. Because of the severe duty to which the wings are subjected in executing this oscillating movement more than 300 times each minute, they rugged construction and have considerable mass. The oscillation over large arcs, par ticularl such as are required in wings which orm the larger sized can bodies, consumes a very considerable amount of energy, and the bearings which support the wings and their actuating members are subjected to excessive wear in many instances. I,

The improvement according to the pres ent invention permits of a material reduction in the stroke of the main portion of the wing and consequently of the mechanical linkage through which the wings proper are actuated, thereby reducing the duty imposed upon the bearings at any given speed or permitting the machine to be run at higher speeds with no greater wear than-characterizes the old machines running at their .usual speeds. This is accomplished by providing an articulated or two'part wing, the two parts being simultaneously actuated in such manner that their combined movement is utilized toform the'can body around the horn. By this construction the required travel of the main part of the wing is materially less than in hitherto known devices,

are necessarily of a,

. the smaller and 1 is shown -3 of the wingscon-form is shown in dotted lines the main wing portion performing only part of the body-forming function, while lighter part of the wing which moves independently, completes the body-forming operation.

, Referring to the drawings, in which there one embodiment accordin to the present invention, the letters A, refer generally to the main parts of the bodyforming wings respectively. These wings are mounted upon a shaft 1, which lies above and parallel to the body-forming horn 2, and are so designed that when they are swung into the closed position as shown in solid lines in Fig. 3, the inner or working faces to the curvature of the horn. The open posit-ion of the wings in the same figure, the wings being swung upwardly away from the horn a sufficient distance to permit the blank B shown in dotted lines to advance in a horizontal plane tangent to the bodyforming horn.

In the operation of the machine. the blank B is fed by any suitable means between the horn 2'and the clamping bar 5 which is mounted at-the lower end of the stationary wing bracket or wing support 6, this occurring while the wingsA, A' oecupy the upper position. The blank is then securely clamped between the horn and the bar 5 in any well known manner. The wings then descend carrying the blank around the two sides of the horn and interlocking the marginal hooks a. The wings are then withdrawn from the horn and the can body completed in the usual manner by bumping are mounted to swing on bearings 11.

reference character D. I prises a rod 20, the upper end ofw ieh is or swedging down the securely interlockedseafn, the can body being ejected from the horn durin theupward movement of the wings so tiat another blank can be positioned over the horn just as soon as the lowermost tips of the wings have risen above the plane of the oncoming blank.

T e wings are actuated by arms which The arms 10 are simultaneously actuated by the reciprocating driving rods 12 pivotally connected to the arms at points 13 which lie etween the inner ends of the arms 10 and the centers 11 about which said arms are adapted to swing. Thedriving rods 12 may be actuated in any suitable being a variety of drives availablefor this purplosa as'is well understood in the art.

e inner ends of respectively to the wings A, A through a resilient coupling general] indicated by the coupli compivoted to the arm 10 Surrounding the ower end of rod is a member 21 which is bored, to reeeive the rod and ide it Whlle perxmttm g" free longitudina movement thereof. he lower end of member manner, there arms 10 are, connected 22 is provided with an eye 23 through which passes the bearing pin 24 connecting the member 22 with the oscillating wing. Interposed between the member 22 and a shoulder 25 on the rod, 20 is a spring 26 through which the force of the downward movement of arm 10 is transmitted to the wing. This is desirable because with such a resilient connection it is not necessary to adjust the movement of the working parts to the very high degree of accuracy that would otherwise be required. If the driving connections were all rigid and the wing, after engaging the horn were urged forward by a further movement of the actuating members, stresses would be set up which might result in damage to the mechanism. The interfitting members 20, 22 of the resilient coupling D are prevented from being separated, by a transverse pin 30 which passes through the member 20 and projects on either side through slots 31 formed in the walls of member 22. By this arrangement the coupling provides a positive connection upon the upward movement of arm 10, the pin 30 engaging the upper ends of slots 31. On the other hand, when the working surface 3 of the wing has been brought into contact with the horn, should therebe a further movement of arm 10, the pin 30 will slide freely in slots 31, and the only effect of a such further movement will be to increase the tension of spring 26 with a consequent slight "increase of the pressure of the wing against the can body surrounding the horn. Up to this point in the description of the body-forming wings illustrated in the figures, the mechanism set forth departs in no material respect from usual practice. The improvement according to the present invention resides primarily in combining with the mechanism herein efore described a member carried by each oscillating wing and which is provided with actuating means, causing it to move relatively to such main portion-of the wing to perform a part of the body-forming function hitherto performed by a unitary wing. This added wing memher. which is carried by the main partof the wing may be described as an auxiliary wing element, and in the embodiment illustrated comprises the longitudinal blade 35 which is mounted upon a transverse slide 36.

When the slide 36 is in the fully extended position indicated in full lines in Fig. 3, the edge; of the blade engages the blank, which has been wrapped around the horn 2, at a point lying substantially on the are of the circle represented by a continuation of the curved working surfaces 3 of the main wing member. That is to say, in the fully extended position the effect of blade l lll Elli all.

- which the wing member oscillates to carry lid ' the wing A swings.

till

construction characterizes rocker arm carries "the slide back and contact of blade with the blank, which the usual bodyforming wing.

The slide 36 is carried in a guideway formed in the lower face of the main wing member A, with respect to whichit is transyersely slidable, i. e., to the right or left in Fig. 3. This guideway in theconstruction illustrated is provided by recessing the lower face of member A so that the edges of the slide 36 lie flush with the surface 0 such member, and guide plate-s 37 are fas toned by means of screws 38 against the lower wing surface to retain the slide in the guideway.

The slide 36 is actuated by a rocker arm 40 which is centrally pivoted to the main wing member A. The lower end of this a roller 41 which lies within a slot 42 in slide 36, the roller acting against the vertical. sides of the slot to move forth in its guideway. The movement of rocker arm 40 which actuates slide 36 is controlled by a cam rollor 45 mounted at rocker arm the roller engaging a cam block 46 which is rigidly mounted on the side of wing bracket 6. The curved surface 47 of the cam block is so designed that when the main wing inember A has been swung into the closed'position against the horn 2, the corresponding movement of the cam roller 45 over cam surface 47 will have caused the full advance of slide 36 necessary to complete the forming of the can body; and when the wing member A has been swung to its open position indicated in dotted lines in Fig. 3, the cam roller will have permitted the upper end of the rocker arm 40 to swing a sufficient distance towardsthe axis 1 about the slide 36, and consequently the forming blade 35 to the retracted or upper position, also shown in dotted lines. The surfaceof the cam lying between the two extreme points above set forth is soformed as to provide a smooth movement of the rocker ar n over its required range of displacement. It will be observed that the cam surface 471 from the lower point of contact of the cam roller to the upper point of contact, gradu' ally approaches the center 1 about which The cam roller 45 is maintained in contact withcam surface 47 by a tension sprin 48 which is connected between a post 49 extending downwardly from the lower end of rocker arm 40, and a post 50 projecting downwardly from the lower face of the main wing member This spring acts continuously to draw the slide 36 into the guideway in wing member A so that the slide is retracted by the action of the spring as far as is permitted by the relationship at any moment between cam roller 45 and the cam surface 47. It

f The dotted line :2: indicates the upper end of the.

" improved wing movement of which-is A. and actuatin means will be clear that the sprin is relied upon only to withdraw the slide a ter the forming of the can body. The slide in being extended to bend the can body blank around the'horn is positively actuated by the cam block 46.

The mechanical advantage gained by providing an auxiliary wing member which moves relatively to the main wingmember is diagrammatically indicated in Fig. 3. the height to which the ordinary body-forming wing would have to be raised in order to permit the blankB to enter above the horn, and the dotted line 3 indicates the corresponding position of the center line of arm 10. It.

will be noted that as compared with the movement of these elements as hertofore employed in performing function, the present movement represents a very considerable reduction in the travel of the corresponding wing members. At any given machine speed it will be obvious that such reduction in movement will result in a material decrease in the forces required to actuate the. various elements, and consequently the life of the bearin will be correspondingly prolonged. Ti e advantage gained in this manner may be in part passed along to other parts of the can body-making machine which co-operate with t e bodyforming wings. Because of the fact, that the according to the resent ine moved out of t e way of vention may blankin a shorter period 0 the oncoming time than heretofore, which delivers the blanks successively to the horn need not be reciprocated at so high a speed as heretofore, there being permitted, if desired, a greater time interval for the feeding cycle while preserving a favorable speed increase in the operation of the wings themselves.

precisely the same fthe feed mechanism While only a single embodiment'of the body-forming mechanism according to the present invention hasfbeen described and illustrated, it will be understood that the invention is not otherwise variously modified limited thereto but may be and embodied without departing from the s set forth in the following clalms.

\ What Lclaim is: w a

1. In a can body-making machine or" the like, a pair of co-operating members the adapted to bend a blank part way around a horn, auxiliary blank bending members relativeln movable with respect to said first mentione members, for said auxiliary memthereto bers adapte to impart movement supplementing the movement of said first pirit thereof, as

mentioned members to complete the bending of the blank into a cylindrical can body while such blank is in the. same position longitudinally of the horn, whereby the reof said wing mem quired movement of said first-mentioned pair of members in making a can body of given size, is reduced. I

2. In a can body-making machine or the like, a horn around which blanks are bent to form can bodies, a pair of oscillating wings the movement of which is adapted to bend a blank part way around the horn, and auxiliary wing members carried by and movable relatively to said wings, adapted to gomplete the bending of the blank around the 3. In a can body-making machine or the like, a horn around which blanks are bent to form can bodies, a pair of co-operating wings the movement of which is adapted to partially bend a blank around the horn, and mechanical means relatively movable with respect to said wings and actuated by the movement thereof to complete the bending of the can body around the horn whereb the required stroke of the said wings will be reduced.

4. In a can body-making machine or the like, a horn around which blanks are bent to form can bodies, a swinging wing member movable toward and away from said horn, an auxiliary win element carried by said wing member an movable relatively thereto, and actuating means for imparting an additional movement to said auxiliary element toward the horn when the said wing member is swung toward the horn 5. A can body-making machine according to claim 4, further characterized in that the said actuating means comprises a camcontrolled device 0 erated by the movement 6. A- can body-making machine according to claim 4, further characterized in that the said actuating means comprises a cam-controlled device operated b the movement of said wing member an operatively connected between a stationary part of the machine and said auxiliary wing element.

A can body-making machine according to claim 4, further characterized in that the said actuating means comprises a rocker arm pivoted at a point between its ends to said swinging wing member, one end of said rocker arm operatively engaging a stationary cam surface and the other end of said rocker arm operatively engaging the said auxiliary wing element carried by the said swinging wing member.

8. In a can body-making machine or the like, a horn around which blanks are bent other end of said rocker 'bent to form can bodies,

to form can bodies, an oscillating wing member movable toward and away from said horn, an auxiliary -wing element slidably mounted on said wing member, and actuating means for said auxiliary wing element operatively connected between said element and a stationary part of the machine.

9. In a can body-making machine or the like, a horn around which blanks are bent to form can bodies, a pivotally mounted main wing member adapted to swing toward and away from said horn, an auxiliar wing element movable with respect to said main wing member, a rocker arm pivoted upon said wing member, and a cam device interposed between one end of said rocker arm and a stationary part of the machine, the

arm being operatively connected to said auxiliary wing element.

10. In a can body-making machine or the like, a horn around which blanks are bent to form can bodies, a pivotally mounted main wing member adapted to swing toward and away from said horn, an auxiliary wing element slidabl carried by said main win r member, a roclier arm pivoted upon said Wing member and having one end 0 eratively connected to said slidable auxiliary wing element, and a stationary cam adapted to engage the other end of said rocker arm whereby to impart to said auxiliary wing element a relative movement with respect to said main wing member.

11. In a can body-makin the like,

machine or a horn around which blanks are a pair .of pivotally mounted main wing members, one on either side of the horn, and each adapted to swing toward and away from the said horn, the said members approaching on op ite sides of the 'horn to bend a can body lank over said horn, said members SWlIl ing away from the horn to permit the fee ing of another blank into position for bending over the horn, each of said wing members carrying a slidably mounted auxiliary win element, and a rocker arm to actuate sai ele ment, cams mounted on a stationary part of the machine and engaging the said rocker arms to control the movement of the said auxiliary wing elements, and actuating meansfor said main wing members.

In witness whereof, I have hereunto signed my name.

PETER KRUSE.

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