US923688A - Double-seaming machine. - Google Patents

Double-seaming machine. Download PDF

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Publication number
US923688A
US923688A US41353808A US1908413538A US923688A US 923688 A US923688 A US 923688A US 41353808 A US41353808 A US 41353808A US 1908413538 A US1908413538 A US 1908413538A US 923688 A US923688 A US 923688A
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Prior art keywords
clutch
chuck
operating
double
tool
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US41353808A
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Charles J Nelson
Olaf Ostlin
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Primerica Inc
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American Can Co
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D51/00Making hollow objects
    • B21D51/16Making hollow objects characterised by the use of the objects
    • B21D51/26Making hollow objects characterised by the use of the objects cans or tins; Closing same in a permanent manner
    • B21D51/30Folding the circumferential seam
    • B21D51/32Folding the circumferential seam by rolling

Definitions

  • nvention 1s to provide a "doublesia'niin'g" hia'chine of a simple, ecient ⁇ 25 andduable'construction, ⁇ in which the oper-l 35's.
  • parier-rotatablecanholding Chucks and the double seaning tools'or rollers operating 'mechanismfjfor advancing 'and holding theml "ag the 'seamingjiianges of the y rotating "canf 'footleverloftreadle for lifting the i4'0 lower can holdi'nrgfchuck against'theupper rotating chuck, connecting, mechanism for setting' the' Aszearningj I'mechanism 1n operation trip 'device operated' by the footl treadlein the the sans l e Specification of'lettersiatnt.
  • Fig. 1 is a slde elevation of a double s eaming machine embodying'- the invention.
  • Fig 2 is a front elevation.
  • Fig. Sl is a detail section on line 3 -j3 l ofvFigll'..
  • Fig. ,4 is a'detailfsction'l Online '17D' lv-4 of Fig. 1.
  • lFigx' is a 'detailsectionfn line 5" '5 of. Fig. 4.
  • f is a' horizontalvsection on-line ff-6 of Flgig, 'and Fig. 7 is jal vvertical. section in-line 7 7.
  • the up er chuck C for the can has its shaft7 C1 -journa ed in a. bearing C2 which ist fur- ⁇ ln-ished-'with a cushion or yielding support()3 2in the frame bracket A2 so thatthe upper IQr,
  • the up er'endlor head of I'theca-n there-in may: be he d V'withia yiel d.
  • the rotating can between the chucksB C.
  • The. yupper can chuck C or its lshaftC1 -is r oy 110 V tated continuously from the driving shaft E,
  • the double seaming tools or rollers F Fl are mounted on independently movable tool holders or slides F2 F3, and are reciprocated as re uired to force them successively one after-t ie other against the seaming flanges fr aof the can cover X and can body X1 as the can is rotated by the rotary can holding chucks B C by means of independently adjustable vit hardened steel bearing plug f, engaging a similar hardened steel bearing plug f1 on the tool holder slide, and also with a roller f2 which engages the operating cam g on the cam shaft G.
  • the seeming tools and their holders or slides F2 F3 and their operating levers F4 and the cam shaft G are all mounted on an adjustable tool carriage or slide H, adapted to be moved'in suitable ways A3 on the frame of the machine, to adjust the .machine for operation upon cans of different sizes. or'di'- ameters.
  • rlhe seaming tool operating levers iii-@F5 are adjustably and pivotally connected 4atf'their upper ends to the carriage H by connecting blocks f3 and adjusting screws f4.
  • the slide or carriage H is adjusted to and from the can holder chucks by means of an adjusting screw H1. It is ixed rigidly in any particular position to which it may be adjust ed by a clamp or set screw h, having ⁇ a handle h1.
  • the cam shaft G is intermittently operated or rotated as required from the driving lshaft, E, preferably by a pulley E3 thereon through a belt E4 engaging a pulley K on a 'i shaft K1 carrying a worm liz, ,which engages 45 a worm gear M on a clutch sleeve in.
  • clutch member M1 which is ⁇ loose on the cam shaft G, and which clutch member M1 is adapted to engage a sliding clutchmember M, having a spring 'in and carried on a sleeve or grooved wheel )i3 which is fixed on the cam shaft G.
  • T he sliding pin or member M2 of the clutch is norn'ially held out of engagement with the toothed clutch member M1 bythe spring m, and is retracted at intervals as required to connect and disconnect the cam shaft from its continuously revolvi'li-e' worm gear by means oi' curved or crescent shaped cam X adapted to fit in and engage a notch m2 in the clutch pin M2, and thus retract the clutch pin from engagement with the clutch member M1 after the cam shaft makes one complete revolution.
  • the movable clutch o Jerating cam or device N is secured to a s iding stem N1 having a spring n for holdingit normally in the groove m3 of the clutchvwheelor sleeve M3.
  • stem N1 is furnished with a notch n? which is adapted to be engaged by a safctv trip device l on the operating arm Plof :he rock shaft P2 which has an arm P3 ce1-rincer ed by a link I"1 with the treadle D.
  • the 'safetv tri device ,P is mounted to slide on the aim -i L and is furnished with a spring p and withl a pin pl'having a roller 1f which engages'a st tionary cam 3, which operates toretract the safety trip cevice P immediately after the movable cam or wedge N is .withdrawn from the clutch pin by the depression of the treadle D.
  • the cam shaft G is also furnished with a stop cam Gx which is fixed to the shaft G, and which is provided with a notch G'l which 1 j engages a.
  • roller R on the bent lever R which bratmg levers F* F2, each furnished with a is connected by a link R2 with the treadle D
  • the lever d1 has a slot di for connet tion with the link R2 so that the treadle D may partially raise the lower chuck before the locking lever R1 is disengaged from the stop cam on the rock shaft.
  • the can to be seamed is 'lirst placed on the lower can holder chuck B and then the operator, with his foot on the treadle D, depresses the treadle and thus raises the lower chuck until the can is clnnked against the rotating chuck C and thereby revolved.
  • the locking lever R1 is lifted out of engagement with the stop cam G1, thus permitting the cam shaft G to rotate.
  • the further depression of the treadle D withdraws the movable crescent wedge or cam N from the clutch pin or mem- 1D0 ber M2, and permits the same to engage the toothed clutch member M1, and thereby clutch the cam shaft to the Continuously rotating worm gear M.
  • the slight further depression of the treadle D causes the pin p1 of the safety trip device P to engage the stationary cani p3 and thus release the stem N1 of the clutch disengaging device N, and thus permit its spring n to return it. to position in the cam groove m3 in the wheel or sleeve M3 so that when the cam shaft G completes vils revolution, the sliding clutch )in M2 will be disengaged from the toothed clutch member M1 on the worm gear M, and the further ro tation of the cam shaft stopped.
  • double seaming tools operating mechanism ing mechanism, a foot treadle for raising the lower can holding chuck against the upper one, connecting mechanism for setting the seaming mechanism in operation when the lower chuck 1s raised, and a safety trip device operated by the foot treadle in 130 'l the lact of .chucking ⁇ -t.he'icainand fcam means l l cnn'lfiiolled by said-safety tripdevices ktoaiitoeach, can is; y specified. j
  • seamingv -gagingdevice thereforLa' spring for holding said disengaging device 'in 4its normal* posi-- tion, -an operating arm for actuating said clutch disengaging device from said foottreadle, and aesafety trip Vdevice connectingl a pair of reciprocating holders for sai y tools
  • the coinloinationwith-a pair of rotary can holding chucks, ofnieans for imparti-ng rota-rvy inovementgthereto', double seeming tools operate ing mechanism for advancing and holding and can covei, connecting means between said chuckv rotating means and said sea-ming tool operating mechanism, a foot treadle for raising the lower can holding ⁇ chuck against the upper one, connecting mechanism for setting the lseaming mechanism in operation when the lower chuckis raised, 'and a safety' trip device operated by the foot treadle in the actofchucking the can to subsequently automatically stop or disconnect the seaming mechanism when the period of operation on each can is ccinpleted, a stop caml and a locking device engaging said stop cain, ⁇ sub stantially as speciiied.
  • ating' mechanism in motion is, through action of seid trip device, restored to position lfor disengeg'ing the clutch when the seeming" cycle or period is completed on each een 1ndependent ofthe position of the foot lever, substantially es specified.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mechanical Operated Clutches (AREA)

Description

DOUBLE SBAHING MACHINE.
APPLIoATloN rILsnfJAlLal, 190s.
mama June 1, 1909."
8 SHEETS-SHEET l Il,
c. J. NELSON & o. os'rLIN. DUUBLE `SlzAllIlGr MACHINE. l APPLIOATION FILED JAN. 31, 1908. Patented June 1 [1 s sums-snm z.
L' Z j"" 5 .7 c g 4 f o. J. NELSON a o. os'rLlN. DOUBLE SBAMING m0111113.
AIPTILIIOA'LION `FILED JAILSI, 1908.
Patented .June 1,1909.
I'zg
tion and tohold itin op'- erator relievesjwthe presf the," upper rotating chuck.
vv the seaming roller should tune. nvention 1s to provide a "doublesia'niin'g" hia'chine of a simple, ecient `25 andduable'construction,`in which the oper-l 35's. parier-rotatablecanholding Chucks and the double seaning tools'or rollers, operating 'mechanismfjfor advancing 'and holding theml "ag the 'seamingjiianges of the y rotating "canf 'footleverloftreadle for lifting the i4'0 lower can holdi'nrgfchuck against'theupper rotating chuck, connecting, mechanism for setting' the' Aszearningj I'mechanism 1n operation trip 'device operated' by the footl treadlein the the sans l e Specification of'lettersiatnt.
lllinoi's, have' invented ja "elat'es to.l` improvements' in 1 vle and' permitsthe canA Occasions defective work, asf
he rotating can-only for a moves up and down 1li/suitable guides A1 on the frame of the machine, and is reciprocated 'with the lever d1, which is -pivoted to the `framefat (Z2 and is'connected, at itsl outer. end` 'to a clampd3 whichis secured to the recipro-I e' per' tors'footfon he' foot., in y'pressure against the Ys earning tools or inventio`11'-='frth'er, ,consistsJ in `Jcornbinthffthe se ing fr ollersianclfr upper an'd,l
v'N EliseNL;AISTn Cugini o sTLIv -O MAYWOOD, ILLINOIS, Ass'IGNoRs TOzMQ/Enicm ciingccngnna HOF, NEW yoann; vr.; @CORPORATION .OF .NEW JERSEY. f Y y f,
.Patented Juge 1,- "1969;= y
* cushion yfor theiheaiinof .the lupperv chuck' disk lso that the upperjch-ck disk will operate' to hold the can yieldinglv against the' pre'sf sureor thrust ofthe seamjng'tocls.
Thefinven'tion further ef'msist'si'n the novel '60! constructibn' of partsand Ydevices and in the novel co mb'in'ations*of` 'parts and devices l herein shown-'and described, and more'particularly Aspecified in the claims.v
' Inthe accompanying djrawing'forming a 65 part of this-specification,'Fiwre 1 is a slde elevation of a double s eaming machine embodying'- the invention.` Fig 2 isa front elevation. Fig. Slis a detail section on line 3 -j3 l ofvFigll'.. Fig. ,4 is a'detailfsction'l Online '17D' lv-4 of Fig. 1. lFigx'is a 'detailsectionfn line 5" '5 of. Fig. 4. f is a' horizontalvsection on-line ff-6 of Flgig, 'and Fig. 7 is jal vvertical. section in-line 7 7.
Of Fig. 6, '31ml Fig; 8 vis a detail sectional View showing'the (mitch. .F 9-i'sfa detail' sectional view on linev 9 3101 Figi 7 and Fig. 10 is a detail perf spective view ofthe clutchv disengaging de# vlce. g *In the `drawing, A represents the fraine'of theinachine.7 Y ,B' is the lower rotatabler and Vreciproca? tin can holding chuck, having its stud o1' shaft! furnishedwith' an end pivot or antifriction bearing 1b1 lsupported on`a yielding or cush-.f85 ioned plug' b2 in they reciprocating stem'B1 of.v the lower chuck, which-is furnished with ay socket b3 tofreceive said` stud b, the yieldingsupport b2 and-its spring 114. The 'stem BL as required to vchuck the can against the upper rotating chuck C, -by means of afoot trea'dle T2 connected by an adjustable link d 'eating stem B1 of the lowerchuck afspring d? connected tothe treadle D restores itZto nor. mlposition.- e ff @.1100 -The up er chuck C for the can has its shaft7 C1 -journa ed in a. bearing C2 which ist fur-` ln-ished-'with a cushion or yielding support()3 2in the frame bracket A2 so thatthe upper IQr,
:tating can chuck land, the up er'endlor head of I'theca-n there-in may: be he d V'withia yiel d.
roflers `liy F1 as the samel arefforced against .the rotating can between the chucksB C. The. yupper can chuck C or its lshaftC1 -is r oy 110 V tated continuously from the driving shaft E,
upper end ofthe chuck shaft Cl for adjusting the position of the upper chuck'in respect t0 the seaming rollers l1" F1. The double seaming tools or rollers F Fl are mounted on independently movable tool holders or slides F2 F3, and are reciprocated as re uired to force them successively one after-t ie other against the seaming flanges fr aof the can cover X and can body X1 as the can is rotated by the rotary can holding chucks B C by means of independently adjustable vit hardened steel bearing plug f, engaging a similar hardened steel bearing plug f1 on the tool holder slide, and also with a roller f2 which engages the operating cam g on the cam shaft G.
The seeming tools and their holders or slides F2 F3 and their operating levers F4 and the cam shaft G are all mounted on an adjustable tool carriage or slide H, adapted to be moved'in suitable ways A3 on the frame of the machine, to adjust the .machine for operation upon cans of different sizes. or'di'- ameters. rlhe seaming tool operating levers iii-@F5 are adjustably and pivotally connected 4atf'their upper ends to the carriage H by connecting blocks f3 and adjusting screws f4.
The slide or carriage H is adjusted to and from the can holder chucks by means of an adjusting screw H1. It is ixed rigidly in any particular position to which it may be adjust ed by a clamp or set screw h, having` a handle h1. The cam shaft G is intermittently operated or rotated as required from the driving lshaft, E, preferably by a pulley E3 thereon through a belt E4 engaging a pulley K on a 'i shaft K1 carrying a worm liz, ,which engages 45 a worm gear M on a clutch sleeve in. which is `loose on the cam shaft G, and which clutch member M1 is adapted to engage a sliding clutchmember M, having a spring 'in and carried on a sleeve or grooved wheel )i3 which is fixed on the cam shaft G. T he sliding pin or member M2 of the clutch is norn'ially held out of engagement with the toothed clutch member M1 bythe spring m, and is retracted at intervals as required to connect and disconnect the cam shaft from its continuously revolvi'li-e' worm gear by means oi' curved or crescent shaped cam X adapted to fit in and engage a notch m2 in the clutch pin M2, and thus retract the clutch pin from engagement with the clutch member M1 after the cam shaft makes one complete revolution. The movable clutch o Jerating cam or device N is secured to a s iding stem N1 having a spring n for holdingit normally in the groove m3 of the clutchvwheelor sleeve M3. The
vthrough the lever d1.
stem N1 is furnished with a notch n? which is adapted to be engaged by a safctv trip device l on the operating arm Plof :he rock shaft P2 which has an arm P3 ce1-rincer ed by a link I"1 with the treadle D. The 'safetv tri device ,P is mounted to slide on the aim -i L and is furnished with a spring p and withl a pin pl'having a roller 1f which engages'a st tionary cam 3, which operates toretract the safety trip cevice P immediately after the movable cam or wedge N is .withdrawn from the clutch pin by the depression of the treadle D.
The cam shaft G is also furnished with a stop cam Gx which is fixed to the shaft G, and which is provided with a notch G'l which 1 j engages a. roller R on the bent lever R which bratmg levers F* F2, each furnished with a is connected by a link R2 with the treadle D The lever d1 has a slot di for connet tion with the link R2 so that the treadle D may partially raise the lower chuck before the locking lever R1 is disengaged from the stop cam on the rock shaft.
ln operation, the can to be seamed is 'lirst placed on the lower can holder chuck B and then the operator, with his foot on the treadle D, depresses the treadle and thus raises the lower chuck until the can is clnnked against the rotating chuck C and thereby revolved. As the'treadleD is depressed, the locking lever R1 is lifted out of engagement with the stop cam G1, thus permitting the cam shaft G to rotate. The further depression of the treadle D withdraws the movable crescent wedge or cam N from the clutch pin or mem- 1D0 ber M2, and permits the same to engage the toothed clutch member M1, and thereby clutch the cam shaft to the Continuously rotating worm gear M. The slight further depression of the treadle D causes the pin p1 of the safety trip device P to engage the stationary cani p3 and thus release the stem N1 of the clutch disengaging device N, and thus permit its spring n to return it. to position in the cam groove m3 in the wheel or sleeve M3 so that when the cam shaft G completes vils revolution, the sliding clutch )in M2 will be disengaged from the toothed clutch member M1 on the worm gear M, and the further ro tation of the cam shaft stopped.
ll'e claim z- 1. ln a double seaming machine, the combination with a pair of rotary can holding chucks, of' means for rotating said chucks,
double seaming tools, operating mechanism ing mechanism, a foot treadle for raising the lower can holding chuck against the upper one, connecting mechanism for setting the seaming mechanism in operation when the lower chuck 1s raised, and a safety trip device operated by the foot treadle in 130 'l the lact of .chucking `-t.he'icainand fcam means l l cnn'lfiiolled by said-safety tripdevices ktoaiitoeach, can is; y specified. j
malaria@ meltamsm vi. @f1.1 'the Periodici Operation lof ,comple-ted, substantially as means for rotating said, chucks, doulole` 'seamgingtools, operating mechanisms for forcing and ,holding the seaming tools against` the can, and a yieldingsupport for'y the. can chuck adJae-entto theseamingtools to afford i afyielding pressure :between .the seaming jtools and seam,substantially as speciied. f
3. In a 'double seamingl machine, -the 'com- .bination with a-pa'ir of rotatable can holding chucks, of`means for rotating saidchucks,
seamin'g tools, operatin `mechanisms..there- I for, connectingmeanst etween said v:chuck rotating meansand saidseami-ngtool operating mechanism, afoot treadle orreciprocating the lower can holding chuck, connecting mechanism between said treadle and the seaming tool operating mechanism for setting the ksame yin operation, comprising a movable clutch member, a movable dise-n4 U 2. In a double selaniinggmaiehiigiei, v the com-Iy bmation with ,rotarycanholding chucks, ot-
. or disconnect the, seamingv -gagingdevice thereforLa' spring for holding said disengaging device 'in 4its normal* posi-- tion, -an operating arm for actuating said clutch disengaging device from said foottreadle, and aesafety trip Vdevice connectingl a pair of reciprocating holders for sai y tools,
guides in which said holders reciprocate, a air 'of operating cams, and a pair of levers ulcrumed against said tool holders and inter osed between said cams and said tool hollders, said levers bearing centrally against,-
t-he tool holders and pressing them inthe direction of the seam to prevent bindingof the tool holders in theirguides and consequent imperfect," unequal and irregular seaming action, substantially;as`spec1ied.
5I In af double seaming machine, the combination with a pair of rotary can holding chucks, of means for imparting rotary movevment thereto,l a pair ofdouble seaming tools,
a pair of reciprocating holders for. said tools, guides in which said holders reciprocate, a air of operating cams, and a pair oflevers crumed against-'saidtool holders and interi osed between said cams and said tool olders, and 'adjusting screws for said interposed levers, said levers bearing centrally against the tool' holders 'and pressing them in the direction of the seam to prevent bind- `said.foot treadle, and a safety trip ing of v`tlie tool holders in their guides and lvconsequent imperfect, uneual ,and irregular seamingaction, substantia ly as specied.
l 6, Ina double seaming` machine, the coinbination with va pairy of rotary can holding chucks, of means'for imparting rotary movement thereto, a pair of double seaming tools,
a pair o freciprocating holdersfor said tools, guides in which said'holders reciprocate, a pair of operating cams, and a pair of levers tulcrunied against-'said tool holders and inter-y posed between saidv4 cams and vsaid tool holders, said tool holders and levers having interengaging hardened bearing plugs,l said levers bearing centrallyv against. the tool holders andl pressing them 1n the direction of t-lieseam -to-iprevent binding, oi" the tool :holders in their guides and consequent im# perfect, unequal and irregular seaming'action,substaiitiallT as specified.
7. In a double. seaniing machine, the. com# binaticn with a-pair ot rotary can holding chucks, of means for imparting rotary nievement thereto, a pair of double seaminctoola` a pair ot' reciprocating holders for said tools, a pair of 4operating cams, a pair of levers in;
terpos'ed between said cams and said toolI holders, an'd'- an 'adjustable `carriage upong which saidtool holders, 'cams and levers are mounted, substantiallv as speciiied.
8. In adoublefseaming'machine, the coinloinationwith-a pair of rotary can holding chucks, ofnieans for imparti-ng rota-rvy inovementgthereto', double seeming tools, operate ing mechanism for advancing and holding and can covei, connecting means between said chuckv rotating means and said sea-ming tool operating mechanism, a foot treadle for raising the lower can holding` chuck against the upper one, connecting mechanism for setting the lseaming mechanism in operation when the lower chuckis raised, 'and a safety' trip device operated by the foot treadle in the actofchucking the can to subsequently automatically stop or disconnect the seaming mechanism when the period of operation on each can is ccinpleted, a stop caml and a locking device engaging said stop cain,`sub stantially as speciiied.
9. In a double-seaining machine, the coin- -ioo them against the seamingflanges of the can4 bination with a pair otrotary can holding chucks, of seaming tools, operating mechanism therefor, a foot treadle .for reciprocating the lower can holding chuck, connecting mechanism between said treadle and the seaming tool operating mechanism for setting the same in operation and disconnecting the same, comprising a movable clutch ineinber, a movable disengaging device therefor, a
spring for holding said d isengaging device in its normal position, an operating arm for aetuating said clutch ldisengaging device from device 'connecting said operating 'arm with said clutch disengag'ing device,land e stop cem and lock device engaging seid stop cam, subsaid foot lever to set the seeming' roller oper-.
ating' mechanism in motion, is, through action of seid trip device, restored to position lfor disengeg'ing the clutch when the seeming" cycle or period is completed on each een 1ndependent ofthe position of the foot lever, substantially es specified.
11. In o double seeming' machine, the combination with en upper cen holding chuck, of a lower reciprocating' cen holding' chuck, :t foot lever for reciprocating' the snmev` e seeining' tool, e com end com shaft' for operating' lseid seeming' tooi, mechanism for intcrmittently rotating' said shaftv` comprising u clutch, o movable clutch disenguging' device, a movable trip device adapted to engage said clutch disengeging device, whereinv said clutch disengeging device when operated by said toot lever to set the seeming roller operating mechanism in motion, is, thro'tlg'h nction of said trip device, restored to posit-ion for disengzi-gfing' the clutch when the seeming' cycle or period is completed on euch cen independent ot the position of the foot lever, e, stop com and a movable lock therefor actuated by the foot lever, subst enti-elly es specified. p
3.2. ln e seeming machine, the combinetion With an -upper chuck, oli' e lower movable chuck, a foot lever for operating` it, it sea-ming' tool, operating mechanism for the seeming' tool comprisingr e ca-m, cam shaft, clutch, e Worin and Worm geen' loose on thiecem'sheft adapted to he connected thereto by said clutch, e clutch disengaging device, e safety trip device for operating said clutch disen 50 gagging' device and connections for operating the clutch disenegeging device through said safety trip device, substantially as specified.
13. ln e seeming machine, the combination with en upper chuck, of :i lower movable chuck, e foot lever for operetingr it, fr seeming tool, operating' mechanism for the seeming tool comprising e cam, cem shaft, clutch, a worm end a. worm gear loose on the cem shaft adapt-ed to be connectcd'thereto by seid clutch, :i clutch disengaigin'g device, a safety trip device for operating said clutch diseng'eging device, connections for operating the clutch diseng'egfing,r device through said safety trip device, and o stationary projection `tor relensingthe clutch disengzigring devicc from the szi-letv trip device, substrintifill) es speciiied.
14. ln :t seomingvmchine, the combination with en upper chuck, of e lower movable chuck, e foot lever for operating it, e seeming tool. operating mechanism for the seeming.
US41353808A 1908-01-31 1908-01-31 Double-seaming machine. Expired - Lifetime US923688A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4004529A (en) * 1975-07-14 1977-01-25 Atlanta Grotnes Machine Company Can head seaming method and apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4004529A (en) * 1975-07-14 1977-01-25 Atlanta Grotnes Machine Company Can head seaming method and apparatus

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