USRE19460E

USRE19460E - parks

Info

Publication number: USRE19460E
Authority: US
Publication date: 1935-02-12

Description

M. G. PARKS MACHINE FOR FORMING AND lAPPIJI'ING PLASTIC GASKETS TO JAR CAPS Original Filed Oct. 20,. 1950 4 Sheets-Sheety 1 Merrzlb'b 6T Paz/165,

M. G. PARKS Feb. A12, 193s.

MACHINE FOR FORMING AND APPLYING PLASTIC GASKETS TO JAR CAPS original Filedk oct/2o, 195o 4 Sheets-Sheet. 2

HN f J Owl] . `llllllllllwn Feb. "12, 1935.. M G, PARKS Re. 19,460

MACHINE FOR FORMING ANDAPPLYING PLASTIC GASKETS To JAR CAPS Original FledOot. 20, 1930 4 Sheets-Sheet 5 M'. G. PARKS Feb. "1.2, 1935.

MACHINE FOR FORMING AND APPLYING PLASTIC GASKETS TQ JAR CAPS Original Film-1.061.. 20, 1930 4 Sheets-Sheet 4 Reissued Feb. 12, 1935 PATENT LOFI-:ICE

MACHINE Fon FORMING AND APPLYING PLASTIC GAsKETs 'ro JAR CAPs Merritt G. Parks, Dayton, Ohio, assignor to Crown Cork & ySeal Company, Inc.

Original No. 1,884,823,v dated October .25,v 1932,

Serial No. 489,886, October 20, 1930. Application for reissue March 9, 1934, ASerial' No.

` I Claims.

facture of jar caps having plastic gaskets attached thereto, and more particularly it relatesV to a. machine for forming and applying the 5j gaskets to the caps.

'Ihe primary object of the invention is to provide' a machine having a new and improved mode of operation whereby gasketsV of raw rubber composition or other plastic material may be applied to jar caps quickly effectively and uniformly, at a cost` substantially lower than hasheretofore been possible.

A further `object is to provide a machine of the character indicated in which the gasket is made from anelongated strip or strand of plastic material which isr applied incircular form to the cap, with the ends of the strand united and the material compressed to the desired shape in adhering relation to they cap.

Other objects and advantages will become apparent from the following description taken in connection with the accompanying drawings which illustrate a preferred embodiment of the invention. In the drawings:

Figure 1 is a side elevational view of a machine embodying the invention in its preferred form.

Fig. 2 is a plan view of the machine.

Fig. 3 is a sectional view taken along the line 3-3 of Fig. 2, looking inthe direction of the arrows.

Fig. 4 is a vertical sectional view taken along the line 4--4 of Fig. 1, looking in the direction of the arrows.

Fig. 5 is an enlarged fragmental plan section` of the gasket forming and applying means, taken along the line 5--5 of Fig. 4.

Fig.v 6 is an enlarged vertical sectional view taken through the gasket forming and applying means substantially along the line 6-6 of Fig. 2.

Fig. 6a is a fragmental end elevational view of one of the clamps as viewed from the left in Fig. 6.

Fig. 7 is an end elevational view taken through a machine along the line '7-7 of Fig. 6 with certain parts of the machine removed.

Fig. 8 is a view similar to Fig. 6 showing the parts in the positions occupied upon the completion of the gasket applying operation.

Fig. 9 is a vertical sectional View taken along the line 9--9 of Fig. 6.

Fig. 10 is an end elevational view of the machine taken from the line 10-10 of Fig. 1.

Fig. 11 is an enlarged fragmental portion of Fig. 10.

Fig. l2 is a vertical section taken along the line 12-12 of Fig. 2. v

Fig. 13 is a perspective view of 4the knife employed to shear the strand of the gasket material.

Figs. 14 and 15 are similar sectional views taken along the line 14-14v of Fig.. 7 and showing the feeding clamp in its open andy closed posi-` tions respectively.

Generally considered, the machine illustrated. consists vof a gasket-forming and applying device 10, supported in axial alinement with a reciprocable plunger 11, together with an index-y ing holder 12 operable to feed jar caps 14 one, by one into a position between the plunger l1 and the forming and applying device 10 so that gaskets formed by the device may be pressed onto the caps 14 by coordinated approaching movements of the plunger and the device .while the holder remains stationary.

The gasket forming and applying mechanism In the machine shown herein, a strand 15 of gasket material, preferably of round cross sec'- tion, is taken directly from a strand forming machine (not shown), and by a feeding mechanism 16 its end is placed in a forming means which forms theend portion of the strand15 into an annulus vsuitable, for use as a gasket. The annulus is then severed from the remainder of the strandv and is pressed into position in a jar cap 14 in a. mannerv such as to shape the gasket and unite the two ends of the severed strand.

The feeding means and the forming means are in the present case, both rotatable in character and are arrangedrto act in succession to' draw the end portion of the strand over the desired path to form the annulus. Considered general ly, the feeding means preferably comprises a disk 17 (Figs. 1, 2, 4, and 7) fixed on a shaft 18 mounted in

standards

19 and 20 of the frame 21 and carrying a releasable feed clamp 22 (Figs. 7, 14 and 15) for grasping and moving the end of the strand l5. As indicated by the arrow in Fig. 7, the feed clamp 22 on the disk 17 moves the end of the strand 15 along the. adjacent periphery of an oppositely rotating coaxial mandrel 23. The latter in the present case, is cylindrical in form and therefore constitutes in part a circle forming means. This feeding of the strand by thedisk 17 continues until the strand is Within the range of a clamp 24 (Fig. 7) carried by the Winding mandrel. After automatic operation of the clamp 24 so as to grasp the strand 15, the feed clamp 22 is released so that continued rotation of the mandrel 23 may draw the strand into circular form about the mandrel.

In order that the end of the strand 15 may be held close to the mandrel 23 and Within the range of its clamp 24 as it is fed by the disk 17, the feed clamp 22 is carried on a slide 25 which is movable'radially of the disk 17 as shown in Fig. 7 on rods 26, and is pressed radially outwardly of the disk 17 by springs 27 surrounding the rods 26. The clamp 22 is best shown in I Figs. 14 and l5 and is in the form of a lever extending radially with respect to the disk 17 and pivoted at 28 upon the slide 25 so that its outer end is in opposed relation to a stationary finger 30 carried by the slide and forming the other member of the clamp. TheA clamp 22 is normally pressed to its open position, shown in Fig. 14, by a spring 31 acting on one end thereof, and is closed by movement of the opposite end of the clamp along a cam surface 32 formed on a stationary cam plate 33 which, in the present case, isin the form of a disk mounted on the frame of the machine at one side of the feed disk 17.

Rotational movement imparted to thedisk 17 moves the feed clamp 22 toward the end of the strand 15 (Figs. 7 to 11) and the cut-away portion 34 of the cam surface 32 (Figs. 11, 13 and 14)v along Awhich the clamp moves, permits the clamp to beY opened by the spring 31. A detailed view of the cam plate 331s shown in Fig. 13, which is taken from the farside of the plate as shown in Fig. 11. This view shows the formation of the various cam surfaces. By `the action of the springs 27, the clamp 22 is held in its outward radial position untilthe two opposed

members

30 and 22 are positioned on opposite sides ofthe strand` 15. To insure proper positioning of the strand, guide rollers 35 are positioned in opposed relation to the feed disk 17 and the clamp 22 is arranged to grasp the strand between the two guide rollers 35. Theraction of the cam surface 32 along which'the clamp 22 moves causes the clampto be closed ur-itil it has passed to a s econd cut-away portion 36 (Fig. 13`)1o'f the cam surface 32 which permits the' clamp to open.

'Ihe mandrel 23 is mounted within' asleeve 37 for rotation therewith, the sleeve being rotatably mounted in a bearing head 38 of the frame 2l.

One end of the mandrel 23 (the left in Fig.V 6)` normally projects from the end of the sleeve 37 to provide a surface about which the strand 15 may be wound, and the clamp 24 is arranged to operate by pressing the strand against the end of the sleeve 37.

'I'he clamp 24 is preferably mounted principally within the mandrel 23, which is of sleevelike' form to provide space for the clamp and its operating parts, and as shown herein the clamp comprises a movable member in the form of a lever 40 extending diametrically of the mandrel (Figs. 6, 7, and 8). One end of the lever 40 has a pair of spaced clamping fingers 41 formed thereon adapted to project through the mandrel 23 and upon pivotal movement of the lever 40, to press the strand 15 longitudinally of the mandrel into Contact with the end of the sleeve 37.

The clamping lever 40 is pivoted at 40a` intermediate its ends on one end of a lever 42, .which for purposes which will hereinafter appear, ex-

' tends longitudinally throug'li and'l ismpiv'otedA to a transverse wall 43 in the mandrel. Thus `by piv-f otal movement of the lever 40` about its pivoty 40a, the clamp is operated, and in the present case the clamping fingers 41 project through a plate 44 which is longitudinally slidable` iii th mandrel and which insures an unbroken' surfce inthe mandrel at the point Where the strand is Wou'nd. Th'e clamping lever 40 is normally held in its open position by'a spring 46 (Fig. 6) extending through the wall 43 and connected to the lever 40 and to across heald 47 whichisiixed to the outer sleeve 37 in amanner" which Will later appear.

To pivot the clamping lever 4`0` tol its operative position at the desired point in the rotating movement of the mandrel 23,l arod. 4'9 isemployed which is slidable longitudinally through: the Wall 43 and into contact with inner end of thelever 40. A spring acting ori' the rod 49 normally presses the rod toward the lever 40 but its movement is restrained by a trigger 51 engaging an abutment 52 on the rod and ar'- ranged to be released at a predeterminedY point in the rotative movement of the mandrel. A shaft 53 connected to the cross head 47 and serving to rotate the mandreL'also serves to supporti the trigger 51, through the mediumof a collar. 54 fixed on the shaft. The trigger 51, which isi pivoted on the collar 54 extends longitudinally of the shaft 52 and is ope-rated by `a plunger 55 which projects diametrieally through the shaft53.

One end of the plunger 55 is connected at 56: to the end of the trigger 51 so that it may shift the'trigger in either direction, and a spring 57 surrounding the other end of the plunger 55 acts through the plunger to move the trigger 51 yieldingly toward its operative position shown in Fig. 6. In the opposite rotative movement of the

shafts

18 and 53, a cam roller 58 mounted on the end of the plunger 55 is engaged by a cam 60 on the shaft 18 (Figs. 1 and 12) to release the trigger 51 and permit movement of the rod 49 so as to close the clamp 24. t

After the clamp 24 has beenclosed upon the strand, and the clamp 22 released, the mandrel completes itsrevolution to form an annulus from the strand 15 about the mandrel 23. The rotative movement` of the mandrel is then stopped with the annulus positioned in an annular recess or groove, best shown in Fig. 6, which is formed between the mandrel, the end of the sleeve 37 and a stationary collar 60a which `surrounds vand projects vpast the end of the sleeve 37 This groove servesto hold the annulus in the desired form, and the clamp 24 is therefore released at this time. This is accomplished by means acting 'to withdraw the rod 49 toa position wherein it is held by the trigger 51.

As shown in Figs'. 1, 2, and 6, this means comprises a plate 61'y 'xed on the rod 49 so as to be engaged by the end of a movable lever 62 to Withdraw the rod toa position wherein the abutment 52 is behind the shoulder of the trigger 51. The lever 62 is mounted on a bracket 63 (Fig. 1) and is actuated through a link 64 connected to a similarly pivoted vlever 65.. l'l'he lever 65 carries a cam roller 66 engaging a grooved-cam 67 fixed on a shaft 68 which'rotates in timed relation to the rotative movement ofthe mandrel 23.

The sleeve 37 is utilized to move the gasket along the mandrel 23 andto press it into' position onv the cap 14, and for this purpose the mounting of the sleeve in the bearing-38 is arranged to permit longitudinal movement of the sleeve. Such movement is obtained through a roller 69 (Fig. 2) mounted on the lever 65 and -engaging a grooved collar 70 fixed on the mandrel shaft 53. In such movement of the sleeve 37, the mandrel 23 moves therewith umn the end of the mandre1 23 strikes the cap 14 which is backed up by the plunger l1 and thereafter the sleeve continues its movement independently o f the mandrel. Such relative l movement is 'permitted by a yielding lost motion "connection, 'best shown in Fig. 5 of the drawings,

1 wherein it'will be seen that cross head 47 extends through longitudinal slots 71 formed in the mandrel`23. The mandrel'23 is normally projected Hlongitudinally' from the end of the sleeve 37 by 'springs 72'acting between the cross head 47 and :thetransverse wall 43 of the mandrel, the springs 72' being mounted about rods 73 which extend through" the cross head 4,7 and the wall 43 and l'have heads thereon which limit the movement of fthe'parts vby the springs 72.

'a't an angley to the cutting edge of the knife and since this portion cannot pass the knife 75, it vwill beapparent that the annular portion of the strand which isbeing moved by the sleeve 37, will be sheared from the held portion of the strand so *aste leave angularly disposed ends on both portions vof the strand. It will be noted that in the 'present case the knife is secured on the stationary plate 33 (Fig. 11) and the body of the knife, therefore, forms a part of the cam surfaces 32, 34,

'and 36 (Fig. 13).

Since the sleeve 37 must move longitudinally of thernandrel tol press the strand onto the cap 14, `the clamping fingers 41 of the lever '40 are arranged to slide'radially through the plate 44, into an out-of-the-way position shown in Fig. 8, and insuch mvement the lever 40 is guided by a pin projecting radially inwardly from the plate 44 fand loosely engaging an opening in the lever.

The withdrawing movement of the lever 40 is obtained by pivotal movement of the lever 42 upon which the lever '40 is mounted, against the action yof a spring 48 which normally tends to move the lever 42 so as to project the fingers 41 outwardly 'of the mandrel to the position shown in Fig. 6.

After the pointed end edge of the mandrel 23 hasmoved into abutment withthe cap 14, the continued ymovement of the cross head 47 serves to withdraw the -fingers 41 of the clamp v24 radially into the mandrel. This is accomplished by a cam 76 formed on the cross head 47 `and arranged to engage a cam roller 77 on the adjacent end of the lever '42 to vmove the lever against the force of the spring 48 to the position shown in Fig. 8. Thus, lthe path of the sleeve 37 is cleared and its movement is continued until the annulus is pressed within the ilangeA 14a of the cap 14.

AIt will be noted that the advancing movement of the plunger 11 presses the cap 14 positively toward the yielding mandrel 23 until the flange 14a of the cap is positioned withinl and is laterally supported by the 'sides of an annular recess 78 formed in the outer yendof the collar a (Figs. 7 and 8), and while it is thus held the annulus is compressed to rectangular cross sectional form betweenthe cap 14, its flange 14a, the mandrel 23 and lthe end of the sleevev37. It will be seen that the annular recess 78 provides an annular space in which the ilange 14a may be placed with its inner surface alined with the inner surface of the collar 6`0a,'and the compressing action of the sleeve 37 widens the strand 15 to ll the space between the flange 1,4aand the mandrel A23. Such compression serves effectively tojoin ,the radjacent, angularly cuten'ds of the strand,'and a. continuous annular gasket is thereby formed.

To remove the'cap 14 from 'the recess 78 upon completion of the attaching operation, a pair of U-shaped rods 79 are mounted in the transverse wall 43 (Figs. 6 and 7), with their cross members disposed on'opposite sides of the axis of the mandrel 23 and adjacent the clamp 24. One side member 80 of each rod 79 extends longitudinally through the mandrel 23 and out of the otherend thereof (Fig. 6), and both are guided in ears 81 on the collar 54. Extending from the collar is a bracket 82 between which and the rods 79 a pair of springs 83 are arranged to act to press the rods toward the cap 14 positioned at the otherend of the mandrel.

Thus, when the plunger llis withdrawn, the

The indexing cap holder The indexing holder 12 is best shown in Figs. 4 and 6 and comprises a disk of substantial thickness mounted on the overhanging end of a shaft 85 mounted in a bracket 86 (Fig. 1) beneath the `forming device l0 and extending through the `standard lQ of the frame., At equallyv spaced points about its periphery, the disk 12 has ,a plurality of segmental pockets 87k formed therein opening outwardly of the disk and of sulcient width to permita cap 14 to enter `edgewi'se therelinto. The disk 12 is moved intermittently to position the pockets 87 successively between themandrel 23, and theplunger 11, the uppermost pocket on the disk being the one which ismpositioned adjacent the mandrel. ,As shown in 4, the disk 12 is moved in a counter-clockwise direction, and the caps 14 are fed to the pockets 87 of the disk through an inclined chute 88 which discharges a vertically positioned cap 14 into each pocket just lbefore it reaches the uppermost position. It will be seen that the open lowerend of the chute 88 is located opposite, a positiony in which the pockets 87 are stopped in the intermittent lmovement ofthe disk, so that ample opmove into thepocket. e

`After a gasket has been applied to the cap 14 opposite themandrel,v that cap is moved by the lholder 12 towards the left side of the machine *(Fig. 4) and is dropped from its pocket 87.

The plunger 11 and its mounting The reciprocatingplunger 11 is mounted on one end of a shaft 90 (Figs. 1 and 2) which is yslidable through a standard 91 of the frame and is n portunity is provided for the lower cap 14 to If desired, the plunger 11, as well as the chute 88 may be heated 'by suitable electric heaters 99 `It will be seen that the heating of the cap 14 by the plunger 11 causes the gasket when it is applied by the sleeve 37 to the cap to adhere tothe latter rather than to the pressure applying means, thus preventing the gasket from beingv withdrawn by the sleeve 37 upon its retractive movement.

The driving mechanism vAll of the parts of the machine are preferably driven in timed relation to each other from a. single power source such as a motor 102r mounted. on the bed 21 with a pinion 103 on its shaft en gaging a 'gear 104 carried on a horizontal shaft. 105', which is mounted in a standard 106 and extends through the standard 19. On its end adjacent the standard 19, the shaft 105 carries a. gear 107, which, through an idler 108, drives a gear 109 fixed on the shaft 68. f

The shaft 68 is rotated once for each gasketl forming operation and drives the shaft 96 at thesame rate through gears 110 and 111 (Figs. 1. and 2) whereby to reciprocate the plunger 11 once for each revolution of the shaft 68, it being understood that the cam 95 has but a single lobe..

The constantly rotating shaft 68 also drives` `the indexing work holder 12, through the medium, of a Geneva movement, having a disk 112 fixed. to the shaft 68, with a pin 113 (Fig. 4) adapted, to engage radial slots 114 in a Geneva wheel 115 which is xed on the shaft 85 of the work holder.. 'I'he number of slots 114 in the Geneva wheel 115 corresponds to the number of cap-receiving pock-4 ets 87 so that each rotation of the shaft 68 moves; a new pocket 87 into position opposite the man.- drel 23.

The desired intermittent rotary movement of' the feed disk 17 and the mandrel 23 is preferably obtained from the shaft 85 upon which the indexing holder 12 is mounted. To this end the shaft 85 is extended through the standard 20 and carries a gear 117 (Figs. 1, 2 and 3) which through an idler 118 drives a gear 119 on the shaft 53. The idler 118 is preferably made wide enough to permit longitudinal movement of the shaft 53 in the gasket applying operation.

The

gears

117, 118, and 119 are proportioned to impart one complete revolution to the mandrel 23 during each advancing movement of the work holder 12, and it will be seen that this rotation of the mandrel takes place While the movement of work holder is taking place.

The feed disk 17 is oppositely rotated in timed relation to and at the same speed as the shaft 53 by meshing

gears

120 and 121 fixed respectivev ly on the two shafts, and the gear 121 is made of suicient thickness to maintain the two gears in mesh during longitudinal movement of the shaft 53.

Operation A strand 15 of pre-formed l gasket material, preferably of round cross section, is fed from a strand forming machine (not shown) through the chute 101 tothe guide rollers 35 adjacent the intermittently rotating feed disk 17. In the rotation of the disk 17,. the clamp 22 carried thereby is opened, and as the'clamp passes the guide rollers 35, it is closed so as to grasp the strand periphery of vthe adjacent periphery of the mandrel, and duet vto outward radial movement of the clamp 22 .by

the springs 27, the end of the strand is held close to the mandrel 23 for an appreciable distance. During such movement of the strand y15, its end is .automatically secured to the mandrel 23 by the :fingers 41 of the clamp 24 which press the strand against the adjacent end of the sleeve 37.

It will be recalled that the clamp 24 is nor- :mally projected through the mandrel 23 by the .spring 48, and is held in its unclamped position by the spring 46, and its automatic clamping :movement is obtained through the action of a cam 60 upon the plunger 55 which releases the trigger 51 (Fig. 6) and permits the spring pressed rod 49 to strike and actuate the lever 40.

, After the clamp 24 has been closed, the cut- :away section 36 of the cam surface 32 permits the clamp 22 to be opened so as torelease the .strand from the feed disk 17 and permit it to be ldrawn by the clamp 24 into a circle in the space between the mandrel 23, the collar 60a and the sleeve 37.

Just prior to the completion of a full revolution by the mandrel 23, the clamp 22, which is then open, is actuated by movement across the cam surfaces 34, 32, so as to clamp the strand 15 to the feed disk 17 which holds the strand 15 While it is severed from the annulus formed about the mandrel.

The strand l5 is severed by advancing movement of the sleeve 37 which acts as a shearing member in cooperation with the knife 75 to cut the strand at an angle close to the clamp 22 'the sleeve 37 and acts to rock the lever 42upon which the clamp 24 is mounted.

' During such advancing movement of the sleeve `37, the mandrel 23 moves longitudinally with the sleeve by reason of the springs 72 (Fig. 5) and approaches the cap 14 which is then being advanced toward the mandrel by movement of the plunger 11. While the cap 14 is being positioned by the cooperative action of the plunger l1 and vthe mandrel 23 and the recess 78, the advancing movement of the sleeve 37 continues, and after the positioning of the cap is completed the annular strand is compressed o-nto the cap into rectangular cross sectional form with united ends, as shown in Fig. 8. The sleeve 37 thus constitutes a gasket applying means which not only presses the gasket on the cap so as to cause it to adhere thereto but also shapes the gasket to the desired conformation.

The withdrawing movement of the plunger 11 and the sleeve 37 then takes place, and the finished cap is moved .back into the pocket 87 of ,wardly through the mandrel.

The mechanism is thenconditioned for another rotative movement to form another annulus from the strand 15, and such movement occurs automatically due to the drivingconnection between kindexing holder 12 and the strand feeding and circle forming devices.

During such rotative movement of the mandrel to form another annulus, the work holder 12 moves the iinished cap 14 out of the machine and advances another cap from the chute 88 to a position between the mandrel and the plunger 11., so,that the annulus may be pressed thereon in the next reciprocation of the sleeve 37.

From the foregoing it will be apparent that the invention provides a fully automatic machine for forming gaskets and applying them to jar caps and that by forming the gaskets from a preformed strand of material, uniformity of the gaskets is insured. It will also be seen that the machine is adapted for operation at high speeds since the form ofthe gasket material is changed only slightly by the machine.

The method of` making and applying gaskets and the novel gasket construction herein disclosed is claimed .inmy copending application, Serial No. 499.908, filed December 4, 1930.

I claim:

l. A machine for forming andapplying plastic gaskets to jar caps comprising, in combination, means operable to form one end of astrand of gasket, material into a circle, means operable to sever the circularly formed portion of the strand fromcthe remainder of the strand, a clamp operabletohold said strand adjacent to said circular portion while said severing operation is performed, a cap presenting device, and means operable to press the circle of gasket material onto a cap v presented by said device.

2. A machine of the character described coinzpricing a clamp` adapted to grasp the end of a strand ofv plastic material, means to move said clampina circular `path to form the strand. into` arrannulus, means to release the clampafter the.

annulus has been formed, and means operable to press the annulus onto a jar cap.

3. A machine of the character described comprising a pair of members having an annular space therebetween to receive a strand of gasket material arranged in circular. form about the inner one of said 'members with itsends substantially inabutment, means to so arrange a strand in said space, theouter one of said members being.

annularly recessed at one end to receive the flange of a cap with the inner surface of the flange alined with the inner surface of said outer member, and

a plunger of cylindrical ,form movable through said space to forcesaid circular strand onto a jar cap, held in abutment with said members',

whereby to widen saidstrand as determined by the space between said liange and said inner arranged inV circular form about itsv innervoneM of said members with vthe ends substantially `in abutment, the outer one` of said members beingannularly recessed at one end to provide space to receive the flange of a jar'cap with the 'inner surface of said flange alined with the inner sur-'v face of said outer member, and a sleeve-like',v

plunger moveable through the space betweenvsai'df` members to force said strandinto yabutment with a flanged jar cap having its flanged edgewithin the annular recess in said outer member, saidl plunger acting towiden said strip as'determined v by the space between said flange and saidinnerj member and to join the adjacent endsl ofthe strand to form a gasket.

5. A machine of the character described having a pair of members providing an annularY space therebetween to receive a strand of gasket material arranged in circular form about the in-l ner .one of said'memberswith its endsy adjacent to each other, means to hold a jar cap in abutmentY alle through said space to compress the strand onto a cap Aheld against said members by ,said means, said inner member having a longitudinal"V opening therethrough, and means `movable in:` said opening longitudinally of said members and operable to force the cap away from said members when said holding means is removed.

6. A machine of the character described -comprising, in combination, a pair of members prdviding an annular space therebetween opening longitudinally of said membersand ,adaptedy to y' receive a strand of gasket material arrangedin circular form about the ,inner oneof saidmeIn-- bers, a cap presenting member adaptedtoholda jar cap in abutment with said members and iny closing relation tosaid space, a plunger movable through said space to press the strand onto suclry a cap, an element movable longitudinally within the inner one of said members and operable to.` move a cap longitudinally away from said mem.- bers when said cap presenting member is with! drawn, and a spring acting onsaid element` alf--4 ranged to be compressed bya cap 4as it is moved` toward said members.

'1. A machine of the character described. com prising, in combination,v a rotatablyk `mountedA mandrel, a sleevesurroundingsaid mandrel and, movable longitudinally with respect thereto, means for intermittently rotatingsaid mandrel through one revolution, a clamp for securing one end of a strand of gasket materialto said man'-` drel to form a circle from said strand during rotation of the mandrel, and means for vrecipro-v cating said sleeve to move thecircle of gasket material longitudinally of said mandrel to compress the material against a jar cap. i

8. A machine of the'character.described com,- prising a rotatably mounted mandrel, a sleeve sur.- rounding said mandrel and movable longitudinally with .respect thereto, means for intermittently4v rotating said mandrel through onerevolution, a Y clampfor securing one end of astrandofwg'asket material to said mandrel to form acirclefrorrr` said strand during rotation or said mandrel, re-I ciprocatingmeans for moving said sleeveto coznpress the circle of gasket material against `a jar cap, and means acting as an incident to the advancing movement ofl said sleeve torelease said clamp and move the samel tovaninovperative outf ofthe-Way position.

v9. A machine of the character described comprising a rotatably mounted mandrel, a sleeve surrounding said mandrel and movable longiwith said concentric members, a plunger movesl tudinally with respect thereto, means for intermittently rotating said mandrel through one revolution, a clamp for securing one end of a strand of gasket material to said mandrel to form a circle from said strand during rotation of said mandrel, reciprocating means for moving said sleeve to compress the circle of gasket material against a jar cap, and means operating as said .sleeve is advanced to move said clamp radially inwardly into said mandrel.

10. A machine of the character described comprisin'g,'in combination a rotatably mounted mandrel, a sleeve surrounding said mandrel and mov- .able longitudinally'thereon, means for intermittently rotating said mandrel through onerrevolution, a clamp mounted within said mandrel and extending outwardly through the surface of said mandrel, said clamp being movable longitudinally of said mandrel to press a strand of gasket material against the end "of said sleeve and also being movable radially inwardly of said mandrel to clear the path of said sleeve so that it may be moved longitudinally of the mandrel, means `operating in the initial portion of a rotative means operable at a predetermined point in the rotation of said mandrel to close said clamp, said clamp being mounted for movement out of the `path of said sleeve, and means operating as said sleeve is moved toward said clamp to withdraw said clamp from the path of said sleeve.

12. A machine of the character described having a rotatable mandrel, a movable clamp mounted on said mandrel for rotation therewith, a spring normally holding said clamp in one position, a spring pressed member mounted on said mandrel and operableto move said clamp to its other position, a trigger operableto hold said member in inoperative position, means operable to move said trigger and release said member for operation, and means operable to restore said member to its inoperative position.

13. A machine of the character described comz-prising a rotatable mandrel, a sleeve surrounding said mandrel and movable longitudinally thereon, a clamp within said mandrel comprising a lever extending diametrically thereof with a uclamping finger` projecting through the outer v"surface of the mandrel, a member upon which said lever is pivoted, said member being mounted for movement diametrcally of said mandrel to move said clamping finger through said mandrel, meansto pivot said lever, and means operable to shift said member.

14. A machine of the character described comprising a rotatable mandrel, a sleeve surrounding said mandrel and movable longitudinally thereon, a clamp within said mandrel comprising a lever 'extending diametrcally thereof with a clamping finger projecting through the outer surface of the mandrel, a member upon which said lever is pivoted, said member being mounted for move- .ment diametrcally of said mandrel to move said clamping finger through said mandrel, a rod ing said mandrel and movable longitudinally l thereon, a clamp within said mandrel comprising a lever extending diametrcally thereof with a clamping nger projecting through the outer surface of the mandrel, a member upon which said lever is pivoted, said member being mounted for movement diametrcally of said mandrel to move said clamping linger through said mandrel, means operating in the rotative movement of said mandrel to actuate said lever. and means connected to said sleeve and operating on said member during movement of said sleeve along said mandrel to control the position of said member.

16. A machine of the character set forth having a winding mandrel, a clamp thereon, a feed device operable to present the end of a strand of plastic material to said clamp, means for rotating the mandrel through onerevolution, and means for severing the strand after one revolution to form a ring, the feed device being adapted to hold the remainder of the strand after the severing operation.

17. A machine of the character described having a winding mandrel, a clamp thereon, a feed disk having a clamp thereon adapted to grasp the end of a strand of plastic material to feed the same to the clamp on said mandrel, means to rotate said mandrel and said feed disk each through one revolution in opposite directions, and d means for severing the strand after formation of a ring about the mandrel, the clamp on said feed disk being adapted to hold the remainder of the strand after the severing operation.

18. A machine of the character described comprising a rotatable mandrel, a sleeve surrounding and rotating with said mandrel, and movable longitudinally of said mandrel, means for rotating said mandrel, means for reciprocating said sleeve, a clamp operable to secure the end of a strand of gasket material to said mandrel whereby to form a circle from said strand in the rotation of the mandrel', and means for opening and closing said clamp at predetermined points in the movement of said sleeve.

19. A gasket forming and applying machine having a rotatable mandrel, a sleeve surrounding said mandrel and movable longitudinally thereof, a clamp on said mandrel for grasping a strand of gasket material, said clamp beingpositioned during its operation in the path of reciprocation of said sleeve, means for operating said clamp, and means for moving it out of the path of said sleeve.

20. A machine of the character described comprising, in combination, meansI including a first clamp operable to grasp the end of a strand and movable in a circular path to form the strand into an annulus, a strand feeding device comprising a feeding clamp movable for a short distance along the path of said first clamp to move the end of a strand into the clamping range of said first clamp, and means for automatically operating said clamps to transfer the control of k so the strand from said feeding clamp to said first clamp during feeding movement of the strand.

21. In a gasket forming machine, the combination of a rotatable mandrel and rotatable feed disk mountedon parallel axes with the peripheries adjacent to each other, means to rotate the mandrel and the feed disk simultaneously in opposite directions in intermittenty movements of one revolution each, guide rollers mounted in opposed relation to the periphery of the feed disk over which a strand of insulation material may move, a feed clamp on said disk adapted to grasp such a strand, means operable to close said feed clamp upon the strand as the clamp passes said rollers so as to draw said strand along theperiphvery of said mandrel, a second clamp on said mandrel, means operable in the rotation of said mandrel toy close said clamp upon the strand as it is advanced by said feed clamp, means operable upon completion of the revolution of the mandrel to open said second clamp, and means to sever the circularly formed portion of the strand from the remainder of the strand.

22. A gasket forming machine comprising a mandrel and a feed disk mounted on parallel axes for simultaneous rotation in opposite directions with their peripheries adjacent, a first clamp on said mandrel, a feed clamp mounted on said feed disk for limited movement radially thereof, spring means acting to move said feed clamp outwardly of said disk to hold said feed clamp against said mandrel for a substantial distance, means operable to close said first clamp on a strand presented by said feed clamp, and means subsequently operable to release said feed clamp.

23. In a machine of the character described, the combination of intermittently rotatable means operable in each rotation to form a strand of gasket material into an annulus, means reciprocable while said rotatable means is stationary to move the annulus longitudinally of the axis of said rotatable means, an indexing holder for moving caps one by one into the path of said reciprocating means, and driving mechanism operable simultaneously to index said holder and rotate said first mentioned means.

24. A gasket forming and applying machine comprising, in combination, means operable to form an annular gasket, a stationary sleeve through which the formed gasket may be moved, a plunger for so moving the gasket, said lmember having an annular recess in its end in which a jar cap may be positioned and seated in the path of the gasket, means operable to position jar caps one by one in alinement with said recess, a second plunger operable to move each cap into said seat, means for reciprocating said plungers toward and away from each other in vtimed relation, and means operable to move each cap from its seated position in said recess.

25. A gasket forming and applying machine comprising a cylindrical member, means operable to form a plastic annular gasket about said member, means operable to move the gasket longitudinally of said member, a plunger alined with and movable toward said member, an intermittently movable cap holder positioned between said member and said plunger, said holder having a plurality of pockets formed therein each adapted to vhold a jar cap, said pockets being arranged to permit said plunger to be moved therethrough,

means operable to reciprocate said plunger to move a cap from the alined pocket into contact 4with said memberwhile a gasket is pressed onto said cap, and means operable upon withdrawal of said plunger to return the cap to thepocket.

26. A gasket applying machine comprising movable means for pressing a gasket onto a cap, a

seat in which a cap may be positioned while the gasket is applied, a plunger for moving caps into charge a cap into each pocket as it ismoved upwardly toward said position.

27. A machine of the class described comprising a revoluble mandrely arranged to receive `a `15 the periphery of 'the 'disk and arranged to disstrand of gasket material, means for drawing the strand lengthwise around the mandrel to form an annular gasket, and single means for moving the preformed gasket from the mandrel and pressing it against a jar cap in a continuous operation.

28. A machine of the class described comprising a revoluble mandrel arranged to receive a strand of gasket material, means for wrapping the' strand lengthwise around the mandrel toform an annular gasket, and single means for moving the preformed gasket from the mandrel and pressing it against a jar cap in a continuous operation.

29. A machine of the class described comprising a horizontally disposed revoluble mandrel arranged to receive a strand of gasket material, means for drawing the strand lengthwise around the mandrel to form an annular gasket, single means Yfor moving the preformed gasket from the mandrel and pressing it against a jar cap in a continuous operation.

30. A machine of the class described comprising a revoluble mandrel arranged to receive `a strand of gasket material, means for drawing the strand lengthwise around the mandrel to form an annular gasket, and a single means operable to withdra-w the preformed gasket from the man drel and press. it on a jar cap, said mandrel continuously supporting the gasket during the transfer and applying operations.

31.'A machine of the class described cmprisi ing a substantially horizontally disposed revoluble mandrel arranged to receive a strand of gasket material, means for drawing the strand lengthwise around the mandrel to form an annular gasket, and a single means operable to withdraw the preformed gasket from the mandrel and apply it to a jar cap, said mandrel acting as a continuous guide for the gasket during such'movement.

32. A gasket forming and applyingmachine of the class described having in combination a revoluble mandrel arranged to reoeivea strand of gasket material, means for wrapping the strand around the mandrel to form an annular gasket, Y. means for presenting a cap in alinement with port and guide for the gasket during the transferx and applying operations.

33. In a machine of the class described, a substantially horizontally disposed revoluble mandrel arranged to receive a strand of gasket material means for presenting 'a cap in axial alinement with said mandrel, means for wrapping the strand of material around the mandrel to form an annular gasket, and a single means for withdrawing the preformed gasket from the mandrel and press- `ing it against the aligned cap, said mandrel during the transfer operation acting as a continuous support and guide for the gasket.

34. In a machine of Ythe class described, a substantially horizontally disposed revoluble mandrel arranged to receive a strand of gasket material, means for wrapping the strand around the mandrel to form an annular gasket, a sleeve encircling said mandrel and arranged to engage said preformed gasket, and means operable to move the sleeve relative to said mandrel for withdrawing the gasket from the mandrel and aflixing th'e gasket to a jar cap.

35. In a machine of the class described, a revoluble mandrel arranged to receive a strand of gasket material, means for wrapping the strand around the mandrel to form an annular gasket, a cap holder, means for sequentially advancing caps carried by the holder in alinement with said mandrel, means operable to move the preformed gasket longitudinally of the mandrel and press the gasket against an alined cap and wholly ,within the marginal edge of the cap and means :an annular gasket, a cap holder, means for sequentially advancing caps carried by the holder in alinement with said mandrel, gasket applying means operable to move the preformed gasket longitudinally of the mandrel and press the gasket against an alined cap and wholly within the marginal edge of the cap, said mandrel acting as a guide and internal support for the gasket during the transfer and applying operations, and means for insuring the adherence of the gasket to vthe cap when the gasket applying means is retracted therefrom.

37. In a machine of the class described, a revoluble mandrel arranged to receive a strand of gasket material, a sleeve surrounding and revoluble with said mandrel, means presenting a cap in axial alinement with said mandrel, said mandrel normally extending beyond one end of the sleeve, means for wrapping the strand of gasket material around the exposed end of the mandrel, and means for moving the mandrel into engagement with the alined cap, said mandrel having a lost motion connection with the sleeve so that upon the mandrel engaging the cap to permit the continued advancing movement of the sleeve relative to the mandrel whereby the sleeve moves the preformed gasket from the mandrel and compresses it against the cap.

38. In a machine of the class described, a revoluble mandrel arranged to receive a strand of gasket material, means presenting a cap in axial alinement with said mandrel, a sleeve surrounding said mandrel and movable therewith, said mandrel normally projecting from one end of the sleeve, means for wrapping the strand of material around the projecting end of the mandrel to form an annular gasket, said mandrel having a lost motion connection with said sleeve, and means for moving the sleeve relative to said mandrel, whereby to withdraw the preformed `gasket from the mandrel and compress it against the alined cap.

39. In a machine of the class described, a horizontally disposed revoluble mandrel arranged to receive a strand of gasket material, means presenting a cap in axial alinement with said mandrel, a sleeve surrounding said mandrel and movable therewith, saidmandrel normally projecting :from one end of the sleeve, said mandrel having a lost motion connection with the sleeve to permit axial movement of the sleeve independently of the mandrel, meansfor wrapping the strand of material around theprojected end of the mandrel, and means when the mandrel is brought into abutting engagement with the cap for permitting the advancing movement of the sleeve relative to the mandrel whereby to withdraw the preformed gasket from the'mandrel and compress it on the alined cap. 4

40. A gasket forming and applying machine of the class described having in combination a revoluble mandrel having a gripping device associated therewith, means for seizing one end of a strand of gasket material to present the same to said gripping device, means for effecting relative movement between the mandrel and said seizing means whereby to wrap the strand lengthwise about the mandrel to form an annular gasket, means operable to move the preformed gasket from the mandrel onto a jar cap, and means for insuring the adherence of the gasket to the cap.

4l. A gasket forming and applying machine of the class described having in combination a revoluble mandrel having a gripping device associated therewith, means for seizingY one end of a strand of gasket material to present the same to said gripping devicef means for effecting relative movement between the mandrel and said seizing means whereby to wrap the strand lengthwise about the mandrel to form an annular gasket,` means for severing the gasket from the remaining portion of the strand, means operable to move the preformed gasket from the mandrel onto a jar cap, and means for insuring the adherence of the gasket to the cap.

42. In a gasket forming and applying machine, a mandrel arranged to receive a strand of gasket material, means for drawing a strand lengthwise around the mandrel to form an annular gasket, means for supporting a cap in alignment with the mandrel, gasket applying means operable to move the preformed gasket from the mandrel and press it against the inner surface of the top of the cap and wholly Within the marginal edge lof the cap, and means for insuring the adherence of the gasket to the cap.

43. In a gasket forming and applying machine having a mandrel arranged to receive a strand of gasket material, means for wrapping the strand lengthwise around the mandrel to form an annular gasket, means for supporting a cap in.

alignment with the mandrel, gasket applying means operable to move the preformed gasket from the mandrel and press it against the inner surface of the top of the cap and wholly within the marginal edge of the cap, and means for preventing withdrawal of the gasket from the cap when the pressure applying means is retracted.

44. vIn a gasket forming and applying machine having a revoluble mandrel arranged to receive a strand of gasket material, means for wrapping the strand lengthwise around the mandrel to form an annular gasket, means for supporting a cap in alignment with the mandrel, gasket applying means operable to move the preformed gasket from the mandrel and press it against the inner surface of the top of the cap and wholly within the marginal edge of the cap, and means for preventing the gasket from adhering to the gasket applying means whereby the gasket remains in the cap when the pressure applying means is retracted.

45. In a gasket forming and applying machine having a mandrel arranged to receive a strand of gasket material, means for wrapping the, strand lengthwise around the mandrel to form an annular gasket, means for supporting a cap in alignment with the mandrel, gasket applying means operable to move the preformed gasket from the mandrel and press it against the inner surface of the top of the cap, and means for heating the cap whereby to cause the gasket to adhere to the cap and be prevented from sticking to the gasket applying means when the latter retracts.

46. In a gasket forming and applyingfmachine having a revoluble mandrel arranged to receive a strand of gasket material, means for wrapping the strand lengthwise around the mandrel to form an anular gasket, means for supporting a cap in alignment with the mandrel, and gasket applying means for pressing the gasket against the 1nner surface of the top of the cap and wholly within the marginal edge of the cap and shaping the gasket to the desired conformation.

47. In a gasket forming and applying machine having a revoluble mandrel arranged to receive a strand of gasket material, means for wrapping the strand lengthwise around the mandrel to form an annular gasket, means for supporting a cap in alignment with the mandrel, gasket applying means for pressing the gasket against the inner surface of the top of the cap and shaping the gasket to the desired conformation wholly within the marginal edge of the cap, and means fox' preventing withdrawal of the gasket from the cap when the pressure applying means is retracted.

48. In a gasket forming and applying machine having a mandrel arranged to receive a strand of gasket material, means for wrapping the strand lengthwise around the mandrel to form an annular gasket, means for supporting a cap in alignment with the mandrel, gasket applying means operable to move the preformed gasket from the mandrel and press it on the cap, said gasket applying means acting to shape the gasket to the desired conformation on the cap, and means for heating the cap whereby to cause the adherence of the gasket to the cap and prevent its withdrawal with the gasket applying means as the latter retracts.

49. In a machine of the class described, a revoluble mandrel arranged to receive a strand of gasket material, means for presenting a cap in axial alignment with said mandrel, means for wrapping the strand of material around the mandrel to form an annular gasket, a sleeve encircling said mandrel and arranged to engage the preformed gasket, means operable to move the sleeve relatively to said mandrel for withdrawing the gasket from the mandrel and affixing it to the cap, and means for insuring the adherence of the gasket to the cap.

50. In a machine of the class described, a revoluble mandrel arranged to receive a strand of gasket material, means for presenting a cap in axial alignment with said mandrel, means for wrapping the strand of material around the mandrel to form an annular gasket, a sleeve encircling said mandrel and arranged to engage the preformed gasket, means operable to move the sleeve relative to said mandrel for withdrawing the gasket from the mandrel and afxing it to the cap, and means for insuring adherence of the gasket to the cap when the sleeve is retracted from the cap. x

l. In a machine of the class described, a substantially horizontally disposed revoluble mandrel arranged to receive a strand of gasket material, means for providing a cap in axial alignment with said mandrel, means for wrapping the strand of material around the mandrel to form an annular gasket, a sleeve encircling said mandrel and arranged to engage the preformed gasket, means operable to move the sleeve relative to said mandrel for withdrawing the gasket from the mandrel and alixing it to the cap, and means for heating the cap to insure the adherence of the gasket to the cap when the sleeve is retracted.

MERRITT G. PARKS.