US2023598A - Hand seamer for cans - Google Patents

Description

A. L. KRONQUEST HAND SEAMER FOR CANS Dec. 1o, 1935,

Filed Sept. 2l, 1953 6 Sheets-Sheet l 4.a, @RTA Dec. l0, 1935o A. L. KRONQUEST HAND SEAMER FOR GANS Filed Sept. 2l, 1953 6 Sheets-Sheet 2 Dec. 10, 1935. A. L.. KRONQUEST v HAND SEAMER FOR CANS Filed sept. 21, 1933 e sheets-sheet 3 Dec. 1o, 1935. A, KRONQUEST 2,023,598

HAND SEAMER FOR CANS Filed sept. 21, 1933 e sheets-sheet 4 A. l.. KRoNQUEsT 2,023,598

HAND SEAMER FOR CANS Filed Sept. 2l, 1933 6 Sheets-Sheet 5 Dec. l0, A. 1 KRONQUEST 2,023,598

HAND SEAMER FOR CANS Filed Sept. 2l`, 1933 6 Sheets-Sheet E5 Patented Dec. 10,A 1935 Alfred L. Kronquest, Syracuse, N. Y., assignor to Continental Can Company, Inc., New York, N. Y., a corporation of New York Application september'- 21, 1933, seria1Nc.69o,4ss

claims. (ci. 11a-23) 'Ihe invention relates to new and useful improvements in a hand seamer for cans.

An object of the invention is to provide a simple form of construction whereby a can may be rotated by hand and an endk automatically seamed thereto through the operation of the rotating means.

Another object of the invention is to provide a hand seamer wherein a differentially operated planetary gear may be utilized for driving the operating means for the seaming rolls of a hand seamer. y

A still further object of the invention is to provide a hand seamer having an actuated gear l 15'- traveling bodily about the axis of the control cam for the seaming rolls with a positive connecting means whereby said traveling gear operates said cams, so that they are rotated in synchronism.

A still further object of the invention is to provide e simple means for positively lifting the support for the can so as to chuck the can, which lifting means yieldingly holds said can support ln raised position. l

These and other objects will in part be obvious and will in part be hereinafter more fully disclosed.

In the drawings:-

Figure 1 is a view partly in side elevation and 80 partly in section showing a hand seamer embodying the improvements;

Figure 1a is a view of a portion of the machine shown in Fig. 1, with the can support raised for chucklng the can;

85 Fig. 2 is a plan view of the hand seamer;

Fig. 3 is a sectional view on the line 3-3 of Fig. 4:

Fig. 4 is a'sectional view on the line lof Fig. 2;

Fig. 5 is a sectional view on the line 5-5 of Fig. 2, with the exposed parts of the frame and f the seaming rolls omitted;

Fig. 6 is a sectional view on the line 6--6 of Fig. 2, with the exposed parts of the frame and the seaming rolls omitted;

Fig. 'l is a view partly in vertical section and partly in front elevation of a modifiedforrn of hand seamer;

Fig. 8 is a plan view of the same with theshaft in section and the crank removed, and

Fig. 9 is a sectional view on the line @-9 of Fig. 7.

The hand seamer includes a supporting frame which is adapted to be attached to a table. Q3 Mounted in the frame is a rotating shaft carrying a chuck. This shaft is held from endwise movement by suitable means. Located directly beneath the chuck and mounted for rotation on the frame is a canvsupport. Means is provided for liftingvthe can support 'to cause the can to v5 engage the chuck. This lifting means includes a yielding element, and is also so constructed as to positively hold the support raised. Mounted on the frame at opposite sides thereof are seaming devices, each of which includes a seaming roll, 1o

an arm carrying the seaming roll, and an actuating lever adapted to move the arm and carrying a roller cooperating with the control cam. The control camis mounted for free rotation concentric to the axis of the shaft carrying the l.5

chuck. Said control cam is rotated by a gear which is mounted on an eccentric member carried by the shaft. Said gear meshes with an internal gear iixed to the frame. Suitable hand means is provided for rotating the shaft, and this will 20 cause the gear mounted thereon to travel bodily on the internal gear so that a differential movement will be imparted to said movable gear. Means is provided for connecting this movable gear to the control cam, so that the gear will lm- 25 part rotations to the control cam.

Referring more Vin detail to the drawings, the hand seamer comprises a rectangular frame consisting of a base member I, standards 2, 2 connected to said base member, and a cap plate 3 30 which is secured to the upper ends of the standards 2, 2. The standards are preferably provided with reduced sections which are threaded and which extend through the cap plate, and a nut I attached to each standard, secures the 35 cap plate to said standards. Attached at the base of each standard 2 and to the base plate I is a clamping bracket 5. Each clamping bracket is provided with a clamping screw 6, and this provides a means whereby the frame may be rigidly'attached to a table or other support which is indicated at l.

Mounted for rotation in the cap plate 3 is a shaft 8. Said shaft carries at the lower end 45 thereof a chuck 9.l At the upper end of the shaft is a bevel gear I0 which meshes with a bevel gear Ii carried by the shaft i2 to which a crank i3 is attached. Said shaft i2 is iournaled in the bearing extension of the cap plate 3. Said bear- 50 ing extension is indicated at lf3. A cover plate i5 is attached to the cap plate and bearing extension for covering the gears. Said cover plate is provided with an oil port i@ through which lubricating oil may be supplied to a port li in the shaft and from this port in the shaft through radial ports to the bearings for the shaft.

The under face of the cap plate 3 is formed with a recess which is concentric to the axis of the shaft. Located on the inner face of the recess are gear teeth I8 which form an internal gear, the center of which is the axis of the shaft 8. The shaft 8 is provided with an eccentric sec tion I9. Mounted on this eccentric section I9 is a gear 28 which meshes with the internal gear I8. Said gear 28 is caused by the rotation of the shaft tol travel bodily on the internal gear, and for each revolution of the operating shaft, it will be given a portion of a rotation about its own axis. When, the shaft 8 has been rotated a predetermined number of times, it will cause o'ne rotation to the movable gear 28, and thus it is that the movable gear is given a differential movement from the shaft 8 which is rotated by hand.

The can to be seamed is indicated in broken lines at C in the drawings. Said can has a cover loosely applied thereto. 'I'he can is placed on a Acan support 2|. This can support 2I is provided with a depending hub 22 which is mounted for free rotation in a supporting member '23. Said supporting member has a socket or recess to re- 1 lceive the hub 22. In the bottom portion of the" recess is a spring plate 24. 'I'here is a central bore through the hub and threaded into said bore is a hardened cylinder 25. Said hardened cylinder has a spherical endwhich rests on the spring plate 24. Pivoted to the lower portion of the supporting member is a lever 26. Said lever v28` is mounted on a pivot rod 21 which is attached to the supporting member. 'I'his supporting member 23 is mounted for vertical movement in a sleeve 28 which is rigidly attached to the base plate I by bolts 29, 29. 'I'he sleeve 28 is provided with a slot 38 in one wall thereof, and the lever 26 extends through this slot. The lever 26 is provided with a cam face 3|` which leads to a shoulder 32. When the parts are in the position y shown in Fig. l, then the can support 2| is lowered and a can may be placed thereon. When said lever is depressed to the position shown in Fig. 1a, then the cam face 3i, riding on the supporting base I, will lift the can support carrying the can and the end mounted thereon into engagement with the chuck. 'Ihus it is that the can is chucked so that the rotating of the chuck will rotate the can and its support I2I. When the lever 26 is in its depressed position, the shoulder 32 engagesthe base I, and is so shaped as to positively hold -the support in raised position. The spring plate 24 will yield toytake care of any inequalities in the cans. y

'Ihe rst operation seamingroll is indicated at 33. Said roll is journaled on an arm 34 carried by a sleeve 35. This sleeve 35 is in turn mounted i'or free movement on the left-hand standard 2, as viewed in Fig. l4.- A wear plate 38 is mounted onv the standard 2 and rests on a shoulder 31 formed therein, and this sleeve 35 oscillates on this wear plate 36. A spring 38 is attachedv to this arm 34y and to a lug 39, and this spring operates to move the seaming'roll 33 away from the chuck. Associated with thearin 34 is an operating lever 48. Said operating lever 48 is-l provided with a hub-4I intermediate itsends, and this hub is journaled on thestandard v2. above the sleeve 35. Mounted on the lever 48 is a roller 42;

'I'his roller 42 cooperatesv with a` face cam. 43- formed on the camsupporting member orxdiskv 44. The other endof the lever 48 is provided with l an adjustable abutment screw 45 which is adapted to engage the outer face of the arm 34. This limits the outward movement of the arm 34 through the action of the spring 38 thereon. The abutment screw 45 serves as a means for forcing 5 the seaming roll into contact with the can parts, and it is adjustable for varying the tightness of the seam and also for positioning the seaming roll for operation on containers of different diameters. Also mounted in the end of the lever 48 is a compression spring 46 which bears against a shoulder 41 on the cap plate. This spring normally turns the lever 48 in a counterclockwise direction as viewed in Figs. 2 and 3, thus causing the roller 42 to contact with the control cam 43 therefor.

The second operation seaming roll is indicated at 48. Said seaming roll is carried by an arm 49 journaled on the right-hand standard 2, as viewed inv Fig. 4. A spring 58 operating on the arm 49 moves the roller 48 away from the chuck. Associated with this arm 49 is a lever 5I which is likewise journaled on the standard 2. Said lever 5I carries a roller 52 which cooperates with a cam face 53 formed on the cam supporting 25 member 44. There is an adjustable abutment screw 54 carried at the outer end of the lever 5I and also a compression spring 55 which operates to move the lever 5I so as to hold the roller 52 in contact with this control cam.

The cam supporting member 44 is mountedfor free rotation Aon the lower cap plate 56. This cap pf plate is attached to the cap plate 3 by suitable clamping bolts 51, 51 (see Fig. 4). 'I'he shaft 8 extends through this lower cap plate and is jour- 35 naled therein. The chuck is secured to the shaft just beneath the low'er cap plate 56. This lower cap plate has a hub 58 on its inner face, and the cam supporting member 44 is mounted for rotation on this hub 58. This cam supporting mem- 40.

ber is concentric to the shaft and rotates about. the center of the shaft. Said cam supporting member is 4rotated in synchronism and timing vwith the traveling gear 28.

The cam supporting Amember 44 is` provided 4a with a-series of recesses 53 which are similar in cross section. The centers of these recesses are Aconcentric to the axis about which the. cam supbetween the operating gear and the cam member,

that is, the distance the center of the traveling 80 gear is oil'set from the center of the actuating shaft.

After the can is chucked, then the shaft 3 is rotated through the hand crank I3. As this shaft is rotated, it will cause the gear to travel bodily on the internal gear and this will'impart a certain angular movement or fraction of rotation to the gear 28 for each rotation of the shaft 8, or each rotation of the can.A The connecting pins will positively impart the rotating'move# 'lo4 mentgiven to the gear' 28 through the turning ofthe crank to the control cam supporting member -44. These two parts rotate about diiTerent centers, but theyrotate in' timing and synchronism through this 'pin and recess connection join- 75 Gol `basic principles which are described above.

ing the parts. The 'pinsfwilL of course, .shift in the recesses as the movable gear changes its angular position about the center ofthe internal gear, but there will always be a positive connection imparting the movements of one to the other. This will give to the control cam a proper number of rotations for actuating the seaming levers and the seaming rolls controlled thereby. The control cam 43 for the rst operation seaming roll 33 is provided with a depression 6I. 'Ihe control cam 53 operating on the seaming 'lever associated with the second operation seaming roll 48. is likewise provided with a depression 62. The depressions 6| and 62 are brought opposite the rollers 42 and 52, respectively, at the same time, and when in this position, the seaming -rolls are moved to their extreme position away from the chuck. Said rolls are entirely free .from the chuck, and at this time the can can be raised into engagement with the chuck ready for the seaming operation.

'I'he cam supporting member 44 rotates in a counterclockwse direction, as viewed in Fig. 3,l and as indicated by the arrow thereon. Afterthe can is chucked, then the shaft 8 is rotated. 'Ihe cam 43 will move the roller 42 outward, thus bringing the seaming roll 33 in close to the flanges which are to be formed into a double seam. This cam face 43 from the point a to the point b is gradually increasing in radius so that the roller 42 is gradually moved outward, and the seaming roll forced inward to complete the first seaming operation. This inward movement of the first operation roll continues for a little less than 180 degreesy movement of vthe cam 43. Meanthe seaming roll 33 will be moved out of contact With the seam andretained in an idle position until it again moves into the depression 3| so that it is entirely free of the chuck and the can seam ready for receiving another can. The control cam 53 from the point cto the point d is substantially concentric so that when this camis turningthrough a distance slightly less than'iBO degrees, the second operationseaming roll 48 will be moved inward to a slight extent, but retained in an idle position until after the rst seaming operation has been performed. From the point d to the point e, the cam 53 is curved outwardly so that the-second operation seaming roll is forced into contact with the metal for completing the seaming operation and will be held with a very gradually increasing: pressure as said control cam 53 continues its rotation, until finally the roller `52 moves into the depression 62 and this will release the second operation seaming roll from contact with the chuck and the seam to permit the can to be removed from the chuck and replaced by anotherbcan for another seaming operation. i.,

In Figures 7 to 9, there is shown a slightly modified form or construction embodying the broad In this form of the invention, there is a supporting frame which includes standards 2a 2a having a base member la formed integral therewith. Attached to the base plate are clamping brackets la, 5a for securing the frame to the table which is` indicated at 1a. Mounted at the upper ends of the standards is a cap plate 3a, and journaled in this-cap plate is a shaft 8a to which is attached a crank I3a. Mounted at the lower end I of the shaft 8a is a chuck 9a. Mounted on the l 1 supporting frame is a can support 2 Ia. 'I'his'can suppport is carried by a-hub portion 22a which i is mounted in a supporting member 23a-,and this supporting member-is in'turn mountedv in asleeve 5.1'-

28a attached to the'supportingbase member la by suitable clamping bolts. The cap plate 3a 'is' provided with a recess havingl gear teeth Isa forming an integral gear 'similar to'that'above described. Located in this recess is a bodily trav- 1o has an upwardly extending sleeve bearing 58a 20V on which is mounted for rotation a camsupporting member 44a. 'Ihis cam supporting inem-l ber 44a is provided with a cam 43a .with which the roller 52a cooperates. This roller is carried by a seaming lever which controls the seaming 25 roll 48a. 'Ihere is also a face cam 53a on this cam supporting member 44a which cooperates with a roller 42a carried by the seaming lever which controls the seaming roll 33a. 'Ihese seaming levers and the connections for operating the same are similar to those described above in detail. and further description thereof` is not thought necessary. f l v The principal feature of difference between this modified form of construction andl that shown inf 1 Figures l to 6, resides in the manner of operating vthe cam supporting memberfrom the traveling gear 20a. 'I'he cam supporting member 44a is provided with a radial recess 63 having parallel walls. Mounted to slide freely in this radial re- 40 cess is a block 64 which is carriedby a pin 65 fixed to the traveling gear 20a. This Din 65 will travel concentrically about the axis of the travel'- ing gear 20a. Its path of trave, however, is eccentric to the axis of rotation of the cam supporting member 44a. The block will slide radially in this groovegto permit these parts to rotate about dierent` centers, and at lthe vsame time, the rotating traveling gear will impart synchronizing rotations to the cam supporting memher 44a.

It is obvious that changes can be made in the details of construction and the arrangement of the parts without departing from the spirit of the invention as set forth in the appended claims.

Having thus described the invention, what I claim as new and desire to secure by Letters Patent isl. A hand seamer for cans comprising a v:supporting frame, a shaft mounted therein for rotation, a chuck carried by said shaft, a stationary internal gear concentric to said shaft. a

`rotatable gear mounted within said internalgear and meshing therewith, means operated by said shaft for causing said gear to travel bodily on said internal gear, seaming rolls, seaming levers movable about fixed centers for operating said rolls, a member mounted for free rotation about the axis of the shaft. cams carried by said member for actuating said seaming levers, and means connecting said traveling gear to said cam supporting member whereby said member is caused to partake of the rotating movements of said gear. Y 2. A hand seamer for cans comprising a sup- I' porting frame, a shaft mounted therein for rotation, a chuck carried by said shaft, a stationary internal gear concentric to said shaft, a rotatable gear mounted within said internal gear and meshing therewith, means operated by' said shaft for causing said vgear to travel bodilyon said internal gear, seaming rolls, seaming levers movable about xed centers for operating said rolls, a member mounted for free rotation about the axis of the shaft, camsl carried by said member for actuating said seaming levers, and means connecting said traveling gear to said cam supporting member whereby said member is caused to partake of the rotating movements of said gear, said last-named means including a driving pin fixed by one of said parts and extending into a recess formed in the other part.

3. A hand seamer for cans comprising a supporting frame, a shaft mounted therein for rotation, a chuck carried by said shaft, a stationary internal gear concentric to said shaft, a rotatable gear mounted within said internal gear and meshing therewith, an eccentric member carried by said shaft for Vrotatably supporting and causing said gear to travel bodily on said inter-A nal gear, seaming rolls, seaming levers movable about xed centers for operating said rolls, a member mounted for free rotation about the axis of the shaft, cams carried by said member for actuating said seaming levers, and means connecting said traveling gear to said cam supporting member whereby said member is caused to partake of the rotating movements of said gear, said last-named means including a plurality of driving pins each extending into a recess formed in the other part.

4. A hand seamer for cans comprising a supporting frame, a shaft mounted therein for rotation, a chuck carried by said shaft, a stationary internal gear concentric to said shaft, a rotatable gear mounted within said internal gear and meshing therewith, means operated by said shaft for causing said gear to travel bodily on said internal gear, seaming rolls, seaming levers movable about fixed centersfor operating said rolls, a member mounted for free rotation about the axis of the shaft, cams carried by said member for actuating said seaming levers, and means connecting said traveling gear to said cam supporting member whereby said member is caused to partake of the rotating movements of said gear, said last-namedmeans including a plurality of driving pins each extending into a recess formed in the other part, said recesses beingof such diameter as to permit the driving pins to contact with the walls of the recesses at all times during the rotation of the parts.

.5. A hand seamer for cans comprising a supporting frame, a shaft mounted therein for rotation, a chuck carried by said shaft, a stationary internal gear concentric to said shaft, a rotatable gear mounted within said internal gear and meshing therewith, an eccentric member carriedl by said shaft for rotatably supporting and causing said gear to travel bodily on said internal gear, seaming rolls, seaming levers movable about fixed centers for operating said rolls, a member mounted for free rotation about the axis of the shaft, cams carried by said member for actuating said seaming levers, and means connecting said traveling gear to said cam supporting member whereby said member is caused to partake of the rotating movements of said gear, said last-named means including a plurality of pins fixed to said gear, each of which engages a recess in the cam supporting member, said recesses lbeing circular and of a diameter equal tothe pin plus twice the eccentricity of the gear as to permit the pins to contact with the walls of the recesses continuously for imparting a pos- 5 able gear mounted within said internal gear and meshing therewith, means operated by said shaft for causing said gear to travel bodily on said internal gear, seaming rolls, seaming levers movable about fixed centers for operating said rolls, a member mounted for free rotation about the axis of the shaft, cams carried by said member for actuating said seaming levers, and means connecting said traveling gear to said cam supporting member whereby said member is caused to partake of the rotating movements of said gear, said cam supporting member having a raidally extending groove formed therein, a block slidable in said groove, and a pin carried by said gear and extending into said block for imparting through said block rotations to said cam supporting member.

7. A hand seamer for cans comprising a supporting frame including standards spaced from each other, a base plate connecting said standards, a cap plate joining the upper ends of said standards, a shaft mounted in said cap plate for rotation about a vertical axis, a chuck carried by said shaft, a can support rotatably supported by the base plate, means whereby the can support may be raised to cause a can to engage the chuck, seaming rolls, seaming levers for actuating the seaming rolls, said levers being mounted for oscillation, respectively, about the standards, an actuating cam cooperating with said seaming levers and mounted for independent rotation about the axis of said shaft, means for imparting to said cam a differential rotation from said vertical shaft, and hand means for rotating said vertical shaft.

8. A hand seamer for cans comprising a supporting frame including standards spaced from each other, a base plate connecting said standards, a cap plate joining vthe upper ends of said standards, a shaft mounted in said cap plate for rotation about a vertical axis, a chuck carried by said shaft, a can support rotatably supported by the base plate, means whereby the can support may be raised to cause a can to engage the chuck, seaming rolls, seaming levers for actuating the seaming rolls, said levers being mounted for oscillation, respectively, about the standards, an actuating cam cooperating with said seaming levers and mounted for independent rotation about the axis of said shaft, means for imparting to said cam a dierential rotation from said vertical shaft, and hand means for rotating said vertical shaft, said means for raising the can support including a yieldable member on which said can support rests. e5

9. A hand seamer for cans comprising a supporting frame including standards spaced from each other, a base plate connecting said standards, a cap plate joining the upper ends of said standards, a shaft mounted in said cap plate for rotation about a vertical axis, a chuck carried by said shaft, a can support rotatably supported by the base plate, means whereby the can support may be raised to cause a can to engage the chuck, seaming rolls, seaming levers for actuating the seaming rolls, said levers being mounted for oscillation, respectively, about the standards, an actuating cam cooperating with said seaming levers and mounted for independent rotation about the axis of said shaft, means for imparting to said cam a differential rotation from said vertical shaft, hand means for rotating said vertical shaft, said means for raising the can support including a supporting member on which said can support is rotatably mounted, a lever pivoted to said supporting member, and means carried by the frame for guiding said supporting member, said lever having a cam face adapted to engage a frame for forcing the can supporta upwardly when said lever is lowered. 10. A hand seamer for cans comprising a supporting frame including standards spaced from each other, a base plate connecting said standards, a cap plate joining the upper ends of said standards, a shaft mounted in said cap plate for rotation about a vertical axis, a chuck carried by said shaft, a can support rotatably supported by the base plate, means whereby the can support may be raised to cause a can to engage the chuck, seaming rolls, seaming levers for actuating the seaming rolls, said levers being mounted for oscillation, respectively, about the standards, an actuating cam cooperating with said seaming levers and mounted for independent rotation about the axis of said shaft, means for imparting to said cam a differential rotation from said vertical shaft, hand means for rotating said vertical shaft, said ymeans for raising the can support including a supporting member on which said can support is rotatably mounted, ,a lever pivoted to said supporting member, and means carried by the frame for guiding said supporting member, said lever having a cam face adapted to engage a frame for forcing the can support upwardly when said lever` is lowered, said lever terminating in a shoulder adapted to engage the frame and retain said lever in a position for holding said can support raised.1

11. A hand seamer for cans comprising a supporting frame, a shaft mountedtherein for rota-v tion about a vertical axis, hand means for rotatingthe shaft, a chuck carried by said shaft, a can support mounted for rotation on said supporting frame beneath said chuck, seaming rolls, independent actuating devices for said seaming rolls, a control camy for each'of said devices, said control cams being mounted for rotation about the axis of said shaft, and means for imparting from said shaft to said control cams a differential movement relative to said shaft.

12. A hand seamer for cans comprising a supporting frame, a shaft mounted therein for rotation about a vertical axis, hand means for rotating the shaft, a chuck carried by said shaft, a can support mounted for rotation on said supporting frame beneath saidchuck, seaming rolls, independent actuating devices for said seaming rolls, a control cam for each of said devices, said ber for raising and lowering the same.

control cams being mounted for rotation about the axis of said shaft, and means for imparting from said shaft to said control cams a differential movement relative to said shaft, means for raising said can support including a supporting mem`- 5 ber on which said support rotates, a yielding member mounted in said supporting member on which said can support rests, and a vertically moving lever connected to said supporting mem.-

l0 f 13. A hand seamer for cans comprising a sup'- porting frame, a shaft mounted therein for rotation about a vertical axis, hand means for rotating the shaft, a chuck carried by said shaft, a can support mounted for' rotation on said sup- 15 porting frame beneath said chuck, seaming rolls,

' independent actuating devices for said seaming rolls, a control cam for each of said devices, said control cams being mounted for rotation about the axis of said shaft, and means for imparting 20 from said shaft to said control cams a differential movement relative to said shaft, means for rais-- ing said can support including a supporting member on which said support rotates, a yielding member mounted in said supporting member on 25 which said can support rests, an actuating sleeve carried by said frame in which said supporting memberis mounted,l a lever pivoted to said supporting member and having a cam face adapted to engage said frame for raising said supporting .30 member for chucking the can, said cam face terminating in a shoulder adapted to retain said support in raised position.

14. A hand seamer for cans comprising a supporting frame, including spaced standards, a cap 35 plate joining said standard, a shaft journaled in said cap plate for rotation about a vertical axis,

a chuck carried by said shaft, seaming rolls, an arm supporting each seaming roll, said arms being mounted for oscillation, respectively, on said 40 standards, an actuating lever for each arm 'mounted for oscillation, respectively, on said standards, a cam member actuated by said shaft for operating said seaming levers, a spring/for each varm for moving the seaming `roll outward away from the chuck, and an abutment carried by each lever for engaging its associated arm supporting the seaming roll.

15. A hand seamer for cans comprising a supporting frame, a shaft mounted therein for rotation about a vertical axis, a chuck carried by said shaft, a beveled gear attached to the upper end of said shaft, .a horizontal shaft mounted in said frame having a bevel gear meshing with said first-named bevel gear, a crank for rotating I said horizontal shaft, seaming rolls, an actuating lever for each seaming roll, a control cam for operating each lever mounted for independent rotation about the axis of said vertical shaft, and means actuated by said vertical shaft for im- 00 parting to said control cams a. diierential movement relative to said vertical shaft.'

ALFRED L. KRONQUEST.

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