US1904327A - Apparatus for and method of attaching shoe linings - Google Patents

Description

April 18, 1933.

A. H. FRENZEL APPARATUS FOR AND METHOD OF ATTACHING SHOE LININGS Filed March 18, 1929 4 Sheets-Sheet l i i i INVENTOR Am Prezggel,

BY g! V.

fi -Q ATTORNEY April 18, 1933. 1,904,327

A. H. PRENZEL APPARATUS FOR AND METHOD OF ATTACHING SHOE LININGS Filed March 18, 1929 4 Sheets-Sheet 2 ATTORN EY April 1933' A. H. PRENZEL APPARATUS FOR AND METHOD OF ATTACHING SHOE LININGS Filed March 18, 1929 4 heets-Sheet 3 I v '8 Lw a! 9 J6 67 6 Q --fi 65 ii '1 6 :::I :ITIII Z r v 75 mm"- a2 6 I 1 62 J5 a- L r E A, as V l6 1 J 5 7 M 27* INVENTOR Adam H P119258},

42 WITNESSES BY V i0 JZ I. ATTORNEY April 18, 1933.

A. H. PRENZEL APPARATUS FOR AND METHOD OF ATTAGHING SHOE LININGS Filed March 18, 1929 Lia- , BHUUQUWEDBMMW Winn-35%: Z ual 4 Sheets-Sheet 4 J6 I as VENTOR Aa'an E Prerggel,

ATTORNEY Patented Apr. 18, 1933 UNITED STATES PATENT orifice) i ADA! 3. PM OF -HAIIFAX, PENNSYLVANIA, ASSIGHDB 1'0 UNITED SHOE IAGHIHEBY GOBPOBL'IION, OF PATERSOIH, NEW JERSEY, A GQBPOIBA'IION O! mm'rus 1 -012 Ann mnon or macnnte anon nmmes Application filed larch 18, 1929. Serial I0. 347,960.

This invention relates to improvements in shoe machinery and is illustrated herein as embodied in a machine for uniting pieces of sheet material employed in the manufacture of shoes.

It is acomimon practice in the preparation of shoe uppers and especially in connection with vamps and tongues to apply to such shoe parts either tapes or linings by means of an adhesive or by stitching.

The employment of stitching to secure a tape or lining to a shoe part requires the use of a canvas material or the like, whichis heavy enoughefiectively to resist ripping and which therefore is relatively expensive.

Moreover, after sewing the lining or tape and the shoe part together, it is the practice of operators to draw out the thread at the end of the line of stitching of one piece before starting the sewing of the next. The stitched shoe parts are thus connected by a lengthof thread which must be severed close to the parts before they can be considered finished.

With a. view to obviating the above and other disadvantages attending the use of stitching for the above-mentioned purpose, as will presently be demonstrated in greater detail, the present invention contemplates the use of a lining or similar material having a coating of thermoplastic or vulcanizable' cement, i. e., a cement which will establish a connection between the lining or similar material and ashoe part such as a tongue, for example, under the action of heat and pressure. Thus, in practicing this invention it is possible to use a much lighter and correspondingly cheaper fabric than that mentioned above as being used in connection with stitching, of the elimination of danger of ripping.

In view of the foregoing, the invention in one aspect provides improved means, for effecting the adhesive attachment of pieces I of sheet material forming an article, com

prising, as herein illustrated, means defining a restricted channel a part of which is heated, and separate means for moving an article through the channel thereby to subject it to heat and pressure. Preferably, and as herein shown, a portion of the means constituting one of the confronting sides of the restricted channel is heated in order to facilitatethe 'attachment of the parts of the article which is conveyed through the channel.

the illustrated embodiment of the invention,

in the form of a belt, a portion of which belt. is tie channel and which is cause move progres' ivel thro the channelin order to carry articl s throiigli the channel.

The confi'onting sides or walls of the chan nel above referred to in the illustrated constructlon comprise cooperating upper and lower pr means one of which is encircled by the belt. It is thus apparent that the pressing means are arranged to press together the arts of an article of work on the belt in or er to efiect the adhesion of the parts of the article, it being understood that at least one of the contiguous sides oftheparts s coated with a heat-responsiveadhesive or, If desired, a vulcanizable cement.

In accordance with another feature of the invention, the belt is moved with a step motron 1n order to cause the articles on the belt to be presented to the pressing means. To

this end, a feed mechamsm working against the under side of the belt is provided and, as herein shown, includes a feed pad which is moved both toward and from, andin the direction of, the adjacent portion of the belt in a substantiall elliptical path, whereby the belt isperi 'cally advanced through the channel. 7 Invention is also to be recognized in the revision of an extension on the-heated press-' mg member to which some oithe heat of the latter is conducted and against which juxtaposed shoe parts and linings may be presse and partially united as a preliminary opera tion in order to insure that they will be prop-' erly positioned relatively to each other as they are carried through the channel.

While the invention is exemplified hereplication to this operation but may be employed in any instance wherein it is desired adhesively to unite pieces of sheet material to form a shoe part.

6 Other objects and advantages will appear in the following specification, reference being had to the accompanying drawings in which Figure 1 is a side elevation of an illustrati'v'e embodiment of the invention,

Figure 2 is a detail perspective view of the heating table and its extension by means of which a lining is preliminarily tacked to a 7 shoe tongue as suggested by an illustration of 1 the latter immediately below said extension,

Figure 3 is a perspective view of a completed shoe tongue,

Figure 4 is a disassembled perspective view of parts of the feed mechanism,

igure 5 is a vertical section of the apparatus taken substantially on the line 5-5 of Fig. 1,

igure 6 is a vertical section taken on the line 6-6 of Fig. 1,

Figure 7 is a pers ctive view of the feeder face plate hereina ter described,

Figure 8 is an elevation of the apparatus illustrating the side opposite to that in Fig. 1 a portion of the base being shown in sec- 0 tion,

Figure 9 is a horizontal section taken on the line 9-9 of Fig. 8, a part of the base being omitted more clearly to reveal the details of the feed mechanism,

Figure 10 is a plan View of the feed table alone, the belt being indicated in broken lines,

Figure 11 is a perspective view of the resilient feed pad,

Figure 12 is a perspective view of the lateral reciprocator head,

Figure 13 is a cross section of the lateral reciprocator means taken on the line 13-13 of Fig. 9,

Figure 14 is a cross section taken on the line 14-14 of Fig. 13.

Referring more specifically to the drawin s, it is to the flesh side of the ton e 1 igs. 2 and 3) that the lining 2 is to e attached. This lining is usually composed of a fabric, and as recently stated can consist of a relatively thin and cheap material having a coating of adhesive substance 3 which is rendered tacky when heated, or of a rubber compound or some other vulcanizable cement. Preferably the adhesive substance employed is not sticky to the touch, and the prepared linings can be handled and nested without dan er of sticking. But when subjected to the eat and pressure of the apparatus, the linin becomes adhesively attached, or vulcanize to the tongue so that the two are virtually inseparable.

. A fixed base 4 of any suitable description,

55 carries a yoke 5 which is attached thereto by means of the standard 6, and has a bracket 7 in which one end of a shaft 8 is rotatably mounted and to which a feed table 9 is secured by means of screws 10 (Fig. 6). The feed table has a skirt 11 that extends across the front of the apparatus (Figs. 1 and 8) and at least along one side to protect the feed mechanism that is housed b the feed table.

The standard 6 rovides the other bearing for the shaft 8. he latter carries a pulley 12 to which the belt 13 of any power source is applied. In ractice the power source will have an auxi iary clutch by the manipulation of which the apparatus can be started and stopped. The result of driving the shaft 8 is the operation of the feed mechanism which comprises the following structure The revolution of a cam 14 (Figs. 5, 8 and 9) that is secured to the shaft 8 causes the vertical rocking of a feed arm 15. For this purpose the cam 14 bears against a wear plate 16 and the end 17 of a bracket 18, which end opposes the wear plate so that the two define a channel. An oil-soaked piece of felt 19, suitably secured to the vertical side of the bracket, supplies the periphery of the cam and adjoining bearings surfaces with oil, the iormer bearing against the felt as shown in It is also for the foregoing purpose that the feed arm 15 is pivoted to a link 20. The upper and lower ends of this link have bearings 21 by which shafts 22 and 23 are received. The arm 15 is secured to the shaft 22, but the ends of the shaft rock in the bearings 21. The ends of the shaft 23 are received by base knuckles 24 (Fig. 1), and it is optional whether the rocking of the link 20 shall occur upon the shaft, or the link secured to the shaft 23 and the ends permitted to rock in the knuckles 24.

The latter rocking motion is brought about by the action of an eccentric stud 25 (Fig. 13) which is actually a sleeve and which is firmly clamped in position against the face of a head 27 on the forward extremity of the shaft 8. The clamping is done by a nut 28 (Figs. 6, 8 and 13) threaded upon a bolt 29 which receives the stud 25 and protrudes from a lu 30 that is contained by a T-slot 3% extending diametrically across the head 2 A screw 32 with a swivel mounting 3? is threaded into the lug 30 and makes it po.-sible to adjust the eccentricity of the stud 25 when the nut 28 is loosened. This adjustment regulates the amount of motion of the feed arm 15 in the direction of feed. The swivel mounting of the screw comprises an annular groove adjoining the screw head, around which a strap 34 is fitted. This strap will have a hole to receive the screw, and it may be found a simpler mechanical expedient to divide the strap at the hole and bring the two halves up against and around. the annular groove. Thestrap or its halves are secured to the head 27 by screws 35.

' An eccentric strap 36 (Figs. 6 and 8) which surrounds the stud 25 has an arm 37 which is pivotally connected by means of a pin 38 (Fig. 13) to an'arm 26 branching from the link (Fig. 6). A head 39 on thefree end of the feed arm 15 (Figs. 4 and 5) has a slot 40 in which an extension 41 of a pad holder 42 is received. The extension has a slot 43 occupied by a screw 44 when the latter is threaded into a hole in the bottomof the slot 40. Loosening ofthe screw 44 permits up and down adjustments of the pad 35 holder 42.

The latter carries a resilient feed pad 45 (Fig. 11) Usually this will be composed of rubber which is suitably roughened at 46 on the operating surface. A depression 47 running cross-wise of the pad 45 receives a bridge 48 of a feeder face plate 49 (Figs. 5, 7and 8) when the feed pad traverses the openings 50 during the elliptical motion which 25 the cam 14 and eccentric stud 25.

A recess 51 in the table 9 receives the feeder plate 49 and adjoining face-plates 52 (Figs. 8 and 10) which can be moved aside .in the recess for the purpose of oil ng some of the mechanism beneath them. The various face plates are flush with the feed table 9, and it is across the latter' that a yielding canvas, or other continuous belt 53 is moved by the action of the feed plate 45.

Thus far it will be understood that the retation of the shaft 8 causes reciprocation of the feed pad 45. -The motion is approxi-. mately elliptical, this being the resultant of the actions of the cam 14 and eccentric stud 25. The latter rocks the link 20 and produces a motion in the direction of feed which is resolved into an elliptical motion by the coaction of the cam 14. The vertical rocking of the arm 15 and consequently of the feed pad 45 is of a fixed amplitude, unless provi sion is made for equipping the shaft 8 with various sizes of the cam 14, while the amplitude of the lateral motion is adjustable at the stud 25.

By virtue of the latter provision it is necessary to leave the bracket 18 open (Fig. 5), but the end 17 is made long enough so that the cam 14 will maintain its nether bearing regardless of the increase of the throw of the eccentric stud 25. The pad 19 is sufliciently compressible to permit an extreme motion of the arm 15 to the right (Fig. 5) without bindingthe cam 14. In action the pad 45 will feed the belt 53 across the table 9 with a rapid step-by-step motion. The belt passes across the table and under the base 4 for the purpose of feeding the tongue 1 and fining 2 under a heating table 54. The

5 heating table 54 and its immediate accesis imparted to it by the combined actions of sories constitute what' will hereinafter be called the heating'element. The latter ordinarily is held in a fixed relationship with respect to the feed table 9 but can be temporari- 1y raised'by a lever55 or permanently malntained in raised position by a handle 56. The

heating table defines a restricted channel 57 with the table 9. It is through this channal that the belt 53 forces the tongue and lining, and during the passage through which that pressure and heat are applied to the tongue and lining.

The table 54 can be madeof any good metallic conductor of heat but 'it is preferably made of brass, and is sufiiciently large to provide a hot zone of such length as to insure complete attachment of the tongue and lining. The heating table can be made longer than shown in Fig. 5 to take care of an increased speed of the aparatus. In other words, if the apparatus be speeded up to produce more work it may be found necessary to use a longer heating table 54 so that the tongues and linings may be kept in the hot zone for asufiicient length of time.

The heating table 54 is attached to a base 58, which may comprise either a single unit or a composite structure as shown in Figs. 2 and 5, by means of screws 59' and carries an electrical heating coil (not shown) which is contained by a casing 60 and held down by a metallic strap 61. One of the screws 59- may assist in serving the latter purpose.

An extension 62 of he strap 61 (virtually of the heating element) provides a convenient accessory by which linings are preliminarily tacked to the tongues 1 as illustrated in Fig. 2. The extension 62 will become hot,

and the operator has only to place the lining 2 in the proper position upon the tongue 1 and hold an end of the two parts beneath the extension 62 for an instant, when a suflicient adhesion will take place to keep the parts in 3 proper assembly.

Thus an operator can preliminarily lay up supply of prepared tongues which can presently be run through the apparatus in rapid succession, or one operator can prepare the tongues while another presents them to the apparatus if, for the purpose of increasing 115 production, it be desired to employ more than one operator.

. A stem 63 fits inthe base 58 and aset screw 64 secures the latter to the former. The stem is mounted to slide in the knuckles 65 of the yoke 5. But ordinarily the stem remains stationary, no sliding motion occurring until either the lever 55 or handle 56 is operated. A dgeon 66, adjustably or otherwise carri by the stem 63, receives the downward thrust of a heavy leaf spring 67.

One end of the latter is suitably mounted at 68 beside'the yoke 5 (Figs. 1 and 8). A set screw 69 carried by the yoke and'bearing upon the spring will be used to vary the ten- I30 sion of the latter. The pur ose of the spring is to urge the heating tab e 54 against the work, and although the tension of the spring is relatively great it allows the table to yield nevertheless.

A coil spring 70, connected between a lug 71 on the feed table 9 and the lever 55, holds the free end of the latter down against the upper one of a second pair of knuckles 72 protruding from the yoke 5. This prevents vibration of the lever 55. The latter is pivoted at 73 to the standard 6, and a link 74 at the rear end of the lever is connected to a treadle (not shown) by which the heating table 54 may be temporarily lifted if itis desired to do so during the operation of the apparatus.

The free end of the lever has a depression 75 which will bear against the gudgeon 66 when the treadle is thus depressed. The handle 56 is pivoted at 76 to one of the knuckles 65. It has a pair of notches 77 that are connected by a cam bridge 78. The heel 79 of the handle will rest upon a stop 80 on the lower one of the pair of knuckles 72 when a stud 81 on the stem 63 rests in that one of the notches 77 nearest the pivot 76.

Inasmuch as turning of the handle 56 in a counterclockwise direction is prevented by the engagement of the heel 79 with the stop 80 it follows that the lower limit of the heating table 54 will thus be determined. If it is desired to raise the heating table and hold it thus more or less permanently, the handle 56 will be swung to the right, whereupon the cam bridge 78 will raise the stem 63 as it moves under the stud 81, and the latter will become engaged within the second notch 77, holding the heating table at the upper limit.

Turning of the heating table is prevented by the connection of an arm 82 with the stem 63 and a guide 83 that is capable of sliding in the knckles 72 when the stem is moved as already stated.

Side bars 84 (Fig. 10) define a passage across the feed table 9 in which the belt 53 is guided. These bars have short pins 85 that will seat in corresponding holes in the feed table and thus fix the position of the bars. Screws 86 secure the bars, but upon removal of the screws the bars may be removed in order to leave the table perfectly plane.

This provision makes it possible to accommodate shoe findings other than tongues. Patent leather Vamps, for example, require the application of reinforcing pieces at certain points so that the leather will not break out when the shoe is formed. Also, upper leathers are customarily reinforced along certain edges. Since the side bars 84 would be in the way of such oddly shaped ieces of leather, the former will be remov so that the work can be conducted through with utmost freedom.

The operation of the apparatus results, in effect, in moving a tongue, or other shoe part and a superimposed lining with a coating oi adhesive or vulcanizable cement face down thereupon through the restricted channel 57 where heat and pressure are applied to cause the adhesion of the lining and the shoe part by means of the feed pad 45 and canvas belt 53, and the heating table 54.

Sometimes leather tongues may be thicker at some places than at others, or a run of tongues may not be entirely uniform in thickness but on account of the yielding quality of the canvas belt it accommodates the various .kinds of tongues, or compensates for diiferent thicknesses in individual tongues. The belt maintains a firm frictional hold upon the tongues so that the latter are conducted through the restricted channel 57 expeditiously and without any hesistation. The tongues will be carried directly through, but should any mal-operation occur it is only necessary to step on the treadle (not shown) and temporarily raise the heating table 54 in order to provide for accessibility to the source of trouble.

Resiliency is also a desirable quality of the feed pad 45. This, being composed of rubber by preference, is flexible and also yields to different thicknesses of tongues. The pad 45 and belt 53 work together. Each constitutes a yielding element, and it is by their combined action that the tongues are fed through the channel 57.

Rotation of the cam 14 produces up and down rocking motion of the feed arm 15 by which the feed pad is carried. Rotation of the eccentric stud 25 causes lateral rocking motion of the feed arm. The two motions are resolved into a substantially elliptical motion so that the feed pad intermittently pushes the belt 53 across the table 9, causing the belt to traverse the channel 57 with a step-by-step motion.

The heating element, of which the table 54 and extension 62 are prominent parts, is heated by an electrical resistance concealed in the casing 60. When this resistance is supplied with current from any convenient source, the ad oining parts become hot. Preliminary tacking of linings 2 to tongues l is accomplished by merely pressing their ends together beneath the table extension 62.

The pressure of the heating table 54 is provided by the leaf spring 67. Thus, the table 54 urges the work against the belt 53 on the table 9 and constitutes the upper boundary of the channel 57. It is the forcing of the tongue and lining through this channel by means of the belt 53 that causes pressure to be applied to the lining.

It will be impossible to tear away the lining without tearing away some of the leather, so close is the bond between the-lining and the tongue. The cementis not subject to softening when the shoe is in use, and there is no danger of its peeling ofi.

of the improved comprising means defining a restricted channel a part of which means-is heated, and separate means for mo a tongue and an article of work through t e channel to be subjected to the heat and pressure.

2. Apparatus of the character comprising means defining the confronting sides of a restricted channel-apart of which means is heated, and means movable with respect to said last-mentioned means and between the sides of the channel to convey an article of work through the channel for subjection to the heat and pressure. 7

3. In a pressing machine, cooperating pressing members adapted for unitlng a work piece and an adhesively coated member, and

' a belt disposed between said pressing m'embers for presenting the work to said pressing members. 7 7

4. Apparatus of the character described comprising means defining a restricted channel a part of which means is heated, and flexible means operating with a step motion for advancing a tongue and an article of work through the channel for sub ection to the heat and pressure.

5. A pressing machine -00H1P1'1S1l1g separate pressing means defining a channel, one of said means being heated, and a belt extending between said means and being movable to advance'an article of work through the channel.

6. Ina pressing machine, a movable work carrying belt, and separate pressing means at opposite sides of a portion of the belt constructed and arranged to press together work pieces on the belt to efiect their adhesion.

7 In a pressing machine, cooperating pressing members defining a channel, a belt encircling one of said pressing means and disposed within said channel, and means for causing the belt to be moved through said channel in order to present work pieces on the beltgto said pressing means.

SJ Apparatus of the character described comprising means defining a restricted channel a part of which means is heated, a continuous belt to traverse the channel, and means to movethe belt with a step motion for advancing a tongue and a superimposed lining with a vulcanizable coating next to the tongue and carried by the belt through the channel for subjection to the heat and pressure 9. Apparatns of the character described carrying a tongue and a superimposed g with a vulcanizable coating next to the tongue, 1

. comprising):

comprising means defining a channel a part of which means is heated, and a continuous belt traversing the channel and said belt having a yielding quality to compensate for inequalities in tongue-thicknescs. 10. Apparatus of the character described able continuous belt traversing the. channel 1 comprising means defining a restricted channel a part of which means heated, a yieldand carrying a tongue anda superimposed lining with a vulcanizable coating next to I the tongue, and feed mechanism for advancingthe-belt including a resilient feed pad acting upon the belt. a

'11. Apparatus of the character described comprising a fixed feed table, a heating table and means for heating it means for support mg the heating table a ve the feed table to define a restricted channel, a continuous belt for traversing the feed table and channel, and feed mechanism beneath the feed table and working the belt to movethe latter.

12. Apparatus of the character described fixed feed table, a heating table disposed a ve the feed table for defining a restricted channel, a continuous belt for tra-'- versing the feed table and channel, feed mechamsm working against the belt in the v cinity of the heating table to move the belt against the underside of through the channel, and means for yielding- 1y suspending the heatin table.

- 13. Apparatus of thee comprising a feed table, a heating table disposed thereabove to define a restricted channel, a continuous belt traversing the feed table and channel, and a reciprocating feed pad working through the feed table agamst' the underside of the belt to move the belt a step motion.

14. Apparatus of the character described comprlslng means (1 a restricted channel, a belt traversing the c annel, a feed p and means for moving the pad both up an 7 down and laterally resulting in a substantially elliptical motion of the pad for periodically engaging the belt to move it with a step motion. V 15. Apparatus of the character described comprising means defining a channel, a belt sltpated in the channel, a feed pad, and a an of eccentric means respectively for movmg the pad up and downand laterally in acter described respect to the belt, resulting in a composite elliptical motion for advancing the belt through the channel by steps.

16. Apparatus of the character describedcomprising means defining a channel, a belt situated in the channel, a feed pad, a feed arm by which the pad is carried, and a pair of eccentric means respectively for rocking the arm up and down andlaterally producing a substantially elliptical resultant motion of the feed pad and causing the pad to periodically on age the belt for advancing it through t e channel.

17. Apparatus of the character described comprising means defining a channel, a belt situated in the channel, a feed pad, a feed arm by which the pad is carried, a cam acting upon the arm to produce vertical rocking motion, and an eccentric stud acting upon the arm to 10 produce lateral rocking motion, said motions resulting in a substantially elliptical motion of the feed pad causing periodic engagement of the latter with the belt for advancing the belt through the channel.

18. Apparatus of the character described comprislng means defining a channel, a belt situated in the channel, a feed pad, a feed arm by which the pad is carried, an eccentric stud for acting on the arm to produce lateral motion, means to adjust the stud for eccentricity-thus varying the amplitude of the lateral motion, a cam for acting on the arm to produce vertical rocking motion, said motions resulting in a substantially elliptical motion of the feed pad causing riodic engagement'of the latter with the elt for advancing the belt through the channel, and

means on the arm defining a channel in which the cam works, being open to allow for the adjustments of the stud.

19. Apparatus of the character described comprislng a feed table and opposed heating table defining a channel, a belt situated in the channel, a feed pad, means for movin the pad to periodically engage the belt and advance it through the channel, and means to adjust the pad in respect to its moving means so as to vary the pressure thereof against the belt in the direction of the heating table.

20. A feed arm carrying a feed pad, a pivotally mounted link to which the arm is pivotally attached, a cam for rocking the arm in one direction upon its pivotal attachment,

eccentric means for rocking the arm in another direction upon the pivotal mounting of the link producing a substantially elliptical resultant motion of the feed pad, and a belt which is periodically engaged during said motion.

21. A feed arm carrying a feed pad, an articulated mounting for the arm, a cam producing motions of the arm in one direction, eccentric means producing motions of the arm in another direction, and a shaft simultaneously actuating the cam and eccentric means for producing a substantially resultant elliptical motion of the feed pad.

22. A feed arm carrying a feed pad, a pivotally mounted link having an arm and having the feed arm pivotally mounted thereupon, a rotatable shaft having a diametrical- 1y slotted head, a stud having an arm connected with the arm of the link, means operating in the slot and carrying the stud for g lay up a supply.

adjusting the position of the stud eccentrical- 1y of the sha t, and means for binding the stud a ainst the face of the head.

23. feed table havin an opening,aheat.- ing table in opposition efinin a channel, a A face plate seated upon the fee table havingan opening registering with the opening of the table, a belt traversing the table and channel, and a feed pad operating in said openings to advance the belt by periodic engagements 'with the underside of the belt.

24. A heating table, a base upon which the heating table is supported. and having a bracket, a feed table attached to the bracket in opposition to the heating table to define a channel, a belt in the channel, means beneath the feed table for working the belt with a step motion, and a shaft journaled on the bracket for actuating said means.

25. The combination of a feed table, a superimposed heatin table with means for heating it, said heatlng table being spaced from the feed tableto define a restricted channel, and means encircling the feed table for conducting material to be vulcanized through the channel for subjection to the heat and pressure.

26. Apparatus for vulcanizing a lining to .a tongue comprising means defining a restricted channel a part of which means is heated, and an extension from said part to which some of the heat is conducted and at which linings are preliminarily tacked to 27. A feed table, an opposed heating table, said tables being positioned and arranged to define a restricted channel, a belt traversing the channel, bars applied to the feed table beside the belt for guiding the latter and the work carried thereby, and means by which the bars are removably secured to the feed table, permitting removal to clear the feed table for the conveyance of oddly-shaped pieces of work.

28. A feed table, a heating table, supporting means for the heating table including a yielding abutment urging the heating table toward the feed table, and means carried by the supporting means for limiting the position of the heatin table and establishing a restricted channel etween the feed and heating tables.

29. A feed table, a heating table and supporting means upon which it is sustained above the feed table, a yielding abutment applying pressure to the heating table urging it toward the feed table, and means carried by the supporting means for sustaining the heating table in any one of a plurality of adjusted positions to establish channels of diiferent depths between the feed and heating tables.

30. A feed table, a heating table and supporting means therefor, a yielding abutment by which the heating table is pressed toward 130 the feed table, a stud that is movable with the heating table, and a handle movably mounted upon the supporting means having a pluralityof notches into any one of which the stud canbe rested by moving the handle to limit the position of the heating table in reference to the feed table.

31. A feed table, a heating table spaced therefrom to define a channel and having a stem, a lever, a spring for pressing. the heating table toward the feed table, and a gudgeon carried by the stem upon which the spring presses and with which the leverlis engageable to raise the heating table against the ten sion' of thes ring."

32. A heatlng table, a base by which it is carried, a casing applied to the base for containing an electrical resistance by which the table is heated, and a metallic strap holding the casing down upon the base having an extension to whichsomerof the heat is conducted.v

33. The herein described method consist- 7 ing of applying a fabric lining with a vulcanizable coating next to a leather tongue, preliminarily applying heat and pressure to a portion of the composite structure for tack- .ing the tongue in position, and subjecting the remainder of the structure to heat and pressure forcompleting a; vulcanizing operation. v

H. PRENZEL.

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