US2680468A - Laminating machine - Google Patents

Description

June 8, 1954 G. L. LEWIS LAMINATING MACHINE l1 Sheets-Sheet 1 Filed Aug. 1 1949 www i I h INVENTOR, lXhw Z. law/s BY iffa wqy.

June 8, 1954 e. L. LEWIS LAMINATING MACHINE ll Sheets-Sheet 2 Filed Aug. 1, 1949 INVENTOR, BY 47%6/7 Z Z @1113".

J1me 1954 s. L. LEWIS LAMINATING MACHINE 11 Sheets-Sheet 3 Filed Aug. 1, 1949 WJev- BY%D 7 l1 Sheets-Sheet 4 Filed Aug. 1, 1949 June 8, 1954 gw s 2,680,468

LAMINATING MACHINE Filed Aug. 1, 1949 11 Sheets-Sheet 5 2,680,468 LAMINATING MACHINE Filed Aug. 1, 1949 June 1954 e. L. LEWIS LAMINATING MACHINE sheetsis 7 Filed Aug, 1 1949 n mum June 8, 1954 G. L. LEWIS 2,680.468 LAMINATING MACHINE Filed Aug. 1, 1949 11 Sheets-Sheet 8 INVENTOR, Q/h /f Z. Zed/l3. z

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June 8, 1954 s. L. LEWIS 2.680.468 LAMINATING MACHINE Filed Aug. 1 1949- 11 Sheets-Sheet 1O /2 4 J86 I i I M .374 I! June 1954 e. L. LEWIS 2,680,468

LAMINATING MACHINE Filed Aug. 1, 1949 11 Shuts-$heet 11 INVENTOR, 677% 11. jaw/.3".

Patented June 8, 1954 UNITED star ES FA'EENT QFFECE Application August 1, 1949, Serial No.

3 Claims.

This invention relates to improvements in laminating machines whereby sheets of paper may be covered on both sides with relatively thin sheets of film which are caused to adhere thereto by the application of eat or pressure, or by the application of both heat and pressure.

Among the several objects of this invention may be noted the provision of a laminating machine having; feed and pressure rollers each provided with a plurality of independently controlled heat may be selectively applied to predetermined portions of the rollers.

A further object is the provision of a laminat- Ing machine having feed rollers and curing rollers having manually adjustable means operable to vary the pressure exerted on the work passing between said rollers.

Another feature of this machine is the provision of curing rollers wherein the diameter of each successive roller is slightly larger than the one just preceded whereby work fed therethrough will be maintained in a stretched-out form at all stages of its travel.

A further feature is the provision of manually controlled means whereby the principal feed rollers are separated when the regular travel of the work is interrupted for any reason. I

Other novel features of the machine are an electric eye controlled means for cutting said work into sheets of equal length, means for conveying said sheets to a stacker which automatically stacks said sheets, and means integral with the machine for attaching parts thereto for performing special operations on the work.

Other objects are simplicity and economy of construction, ease and efiiciency or" operation, and adaptability for use in handling various types and kinds of laminating materials.

With these objects in View as well as other objects which will appear during the course of the specification reference will be had to the drawings wherein:

Figure l a side elevational view of the laminating machine with parts shown in dotted lines.

2 is an enlarged plan view of the machine shown in l with parts broken away.

Fig. 3 is an enlarged side elevational view of the laminatcr with parts broken away.

i is enlarged sectional view taken on line IV-IV of Fig. 2.

Fig. 5 is an enlarged sectional view taken on line V-V of Fig. l with parts left in elevation.

Fig. 6 is an enlarged sectional View taken on line VI-VI or 5.

.Fig. 7 is an enlarged fragmentary sectional view taken on line VII-VII of Fig. 2.

Fig. 8 is a fragmentary sectional view taken on line VIII VIII of Fig. 4.

Fig. 9 is an enlarged sectional view taken on line IX-JX of Fig. 4 with parts broken away.

Fig. 10 is a cross sectional view taken on line X-X of Fig. 9.

Fig. 11 is a cross sectional view taken on line Xl-XI of Fig. 9.

Fig. 12 is an enlarged sectional view taken on line XII-XII of Fig. 2.

Fig. 13 is a diagrammatic view showing the travel of the work through the machine in a typical operation.

Fig. 14 is an enlarged sectional view taken on line XIV-XIV of Fig. 2 with parts broken away.

Fig. 15 is a sectional view taken on line XV-XV of Fig. 14.

Fig. 16 is a plan view of a portion of the work containing one of the windows for admitting light to operate the selenium cell.

Fig. 17 is a sectional view taken on line XVII-XVII of Fig. 16.

Fig. 18 is an enlarged sectional View taken on line XVIII-XVIII of Fig. 1.

Fig. 19 is a sectional view taken on line XIX-Jill! of Fig. 4.

Fig. 20 is a sectional view taken on line XX-XX of Fig. 3, with parts broken away. i

Fig. 21 is a diagrammatic view of the electric circuit for controlling the laminator.

Throughout the several views like reference characters refer to similar parts and the numeral 53 refers to a laminating machine frame having a left hand side frame 28 and a right-hand side frame 22. These side frames are joined together adjacent their lower portions by means of a platform 24 and at their upper portion by a cross bar 26 which is secured to vertical standards 28 which are in turn secured to frames 2t and 22 by screws 39. Frames and 22 each has cor responding depending legs 32, St and each provided with a suitable resilient supporting pad 38 which serves to lessen the vibration of the Rotatably and adjustably carried by side frames and 22 is a lower feed roller 4i on an axle ll and. an upper cooperating feed roller 2 having a fixed axle i3. Upper feed roller 42 is mounted for rotation in bearings as slidably mounted in slots 35 and it in the left and right vertical standards it. The

which are sudably and adjustably mounted in slots 52 and iii- Which are respectively formed in left side frame 251 and right side frame 22.

These slots 52 and '54 are in alignment and register with slots it and 48 respectively whereby as hereinafter set forth said feeding rollers may be independently adjusted to set up variable pressures against each other, and may be moved out of contact with each other. Adjusting screws 56 and 53 mounted for vertical adjustment in side frames 26 and 22 respectively are adapted to sup port bearings 5e whereby when the screws are operated they may be caused to properly position the periphery of feed roller ac to register with the bed of the laminator. The upper roller bearings M are supported on the respective lower bearings a with relatively weak springs 59 positioned therebetween, so that the rollers are normally supported in spaced apart relation.

Pressure adjusting screws at opposite ends of roller 52 are threaded through cross bar 25 to engage the respective slide blocks 62 positioned in slots a5 and 48. The slide b1ocks'62 are positioned in spaced relation to bearings 44 with a relatively heavy compression spring 64 therebetween. When it is desired to create a predetermined pressure between the rollers the operator screws adjusting screws .60 down so as to compress springs 59 and permit the peripheries of rollers Mi and G2 to contact. Springs 64 may be further compressed to produce the desired pressure on the materials being laminated between said rollers.

Due to certain conditions that may arise dur ing the operation of the laminator it may become expedient to quickly separate the rollers 4i} and 42. This is accomplished by the following means: Vertically mounted bars 66, one mounted on each sideof the machine are bifurcated at their upper ends at 6:3 to receive the projecting ends of axle 43 and are slotted adjacent their central portions at is to receive the opposite ends of the lower roller axle M which serve to guide the bars in a straight line of travel. The outer extremities of axle 43 are each provided witha set collar 12 held in position by pins '55. The set collars serve to hold the upper extremities of bars 56 inwardly against the body of the machine. The lower end portion of bar is inwardly and downwardly inclined at it to operatively engage the wedge face is of wedge blockBG. Wedge block 80 has a horizontally disposed bottom face 82 which rests on a wedge plate fi l, secured to the machine frame. It is quite evident that the wedge block thus described will, when removed inwardly, cause the bard? to move upwardly to engage and raise the upper feed roller upwardly from the lower feed roller Ml, while said lower roller is maintained in its lower position by the springs 59.

Each wedge block is provided with an actuating solenoid 8% having a spool 83 secured respectively to the inside walls of frames 20 and 22 by means of screws 98.

Movable core 2?. secured at its one end to wedge block 82 extends into spool'88 and is adapted to be moved inwardly as the solenoid coil 94 is energized. The inner end of core 92 is provided with a non magnetic stem 96 which extends through an aperture ill; formed through cap I00 removably attached to the inner end of spool 88. Positioned about stem 216 between cap Hill and core s2 is a compression spring is: which normally forces wedge block St to the outward position shown in Fig. 5. The extended end of stem 98 is threaded at Hi l to receive the stop nut I96 for limiting the outward movement of wedgeblock 80.

Mounted on platform 24 ismotor I08 having a shaft Hi3 which is operatively connected with speed reducer H2 having a drive shaft HA on which is mounted a sprocket wheel I iii which in turn drives an endless sprocket chain H8. Mounted on axle fli intermediatethe right side frame and roller 43 by screws 300' is a sprocket wheel 28 which is operatively engaged by chain 1 E8 to drive the feed roller 40.

Secured to the left end of roller. 4!! by means of screws 522 is a ring spur gear i24 which rotates with the roller to operatively engage and drive spur gear i213 which is secured concentrically to the left end of roller #32 by screws i122.

Spur gears 126 and 526 have teeth of suiiicient length, so that when roller 42 is raised to disengage roller is as hereinbefore set forth the teeth of these gears will remain in mesh so that the timing of the rollers which are of like diameter will always remain in constant engagement. (See Figs. 5 and 6.)

A belt type feeder L23 disposed in a horizontal plane comprises a lower series of endless belts iSil and an upper series of endless belts 32. The lower endless belt section provides a series of spaced apart belts iSil which are operatively mounted on front roller i3 5, rear roller and intermediate supporting roller Hill. These rollers extend transversely across the machine in parallel relation with the axes of feed roller ii} and are rotatably mounted at the opposite ends respec tively on their axes M2 side frames 28 and 22.

Roller ass is transversely adjustable to properly tension, and position belts Referring to Fig. 12 it will be noted that the axles Hi2 of roller I36 are mounted in a slidably adjustable bearing block Hi l mounted in slots i 36 formed in side frame as 22 respectively. Blocks 144 are notched at i l-t to receive bolts which are positioned in a longitudinally disposed notch 152 in the forward portion M5 of blocks l l i to extend through an opening 554 formed through end plate iEE secured over the end of slot M5 to serve as a bearing for nut Mounted on bolt I50 between the bolts head and block portion 145 is a compression spring Hi5 which when nut S58 is adjusted may move roller 353 to obtain proper tensioning oi the belts 238 to properly direct the work to the feed roller lhe upper series of belts 32 are relatively short and are spaced apart and mounted on rollers i622 and ltd each having axles its journaled in side frames 21'; and 22 and disposed. in parallel relation with axle fill of roller it.

This feeder 528 is driven by motor H33 through the spur gear 526 by like spur gears ifiB, H6 and H2. Spur gear let is an idler which is rotatably mounted on stub shaft 47 fixed to side frame 23 to intermesh with spur gear 424 and spur gear Hi fixed for rotation with 40?... Spur gear llfi inter-meshes with spur gear H2. which in turn is fixed to axle 55d of roller see.

It will be noted that the adjacent reaches of belts 35 and i322 run rearwardly in the same direction, and due to the construction of the train of spur gears, will run at the same peripheral speed as that of the feed rollers and 42.

Referring to Figs. 2 and '7, it will be noted that guide strips ill; and H8 are adjustably mounted on guide rods 5% and i232. These guide rods are threaded and are rigidly supported in side frames 2t and 152. Guide strips llii and l'i'B each have a base angle 58 1 having depending trans verse lugs 635 bored at $88 to slidably fit guide rods 89 and 382. Base angle Hid is vertically slotted at its to receive an adjusting nut 92 which is operatively mounted on threaded rods I and N52. The operator may easily adjust the guide strips to any desired transverse position across the feed bed by operating adjusting nuts 192, and can also produce some slight alignment of the strips to properly direct the work W to the feed rollers.

In many instances it will be found sufficient to use but one of the strips to serve as a guide for directing the work to the feed rollers. For example work fed to guide I16 will run true to the direction of travel of film 2'62 fed from roller 252.

Extending rearwardly from feed rollers 40 and $2 is a planar work bed I98 which is horizontally disposed and is in alignment with the sheet work W being fed from said feed rollers 40 and 42. Rotatably mounted in the rear end portion of work bed [88 is a lower feed roller 200 rigidly fixed to an axle 282 which in turn is rotatably formed therethrough. Qperatively related with is an upper feed roller 284 having an axle 2&6 rigidly fixed thereto. A bracket 2&8 is secured on each side of frame 26 by means of screws Ziz'l. Brackets ear and 259 each are vertically slotted at 2J2 to receive slidably mounted bearings 2 l 4 to receive ends of axle 296. A cap nut 255 fixed to the upper end of bracket 2&8 by

positioned in slot 2 i 2 between bearing 2 i 4 and cap nut 2H5 is adjusted to vary the tension between the feed roller 23!? and 264-. A washer 224 positioned on the upper end of spring 222 serves as a bearing for the end of adjusting screw 22! These feed rollers are adapted to receive the work W fed from the feed rollers ll; and d2 across work bed 98 and between feed rollers 2GB and 294. In order to pull the work in proper alignment, the

wardly against the action of compression spring 231?.

Rigidly fixed to axle 2532 intermediate roller 2% and bearing frame 22 is a sprocket wheel 226 which intermeshes with drive sprocket chain H3 to drive the work W at a speed equal with or slightly greater than the speed of said chain, since the pitch diameter of the sprocket drive wheels is substantially equal to the diameter of the work drive roller with which it is associated.

Just to the rear a shear blade which is operable 239 and bracket and to flange 235 of Planar work bed H8 is transversely slotted at 238 to receive blade 228 therethrough to operatively co-act with stationary shear blade 24! secured to work bed it'll along one edge of slot 238. Solencids and are similarly constructed each having a coil 2: 32 provided with a magnetic core 24 to which one end of blade 228 is secured by a non-magnetic core extension 246.

Integral with standard 28 and wardly and upwardly therefrom disposed at opposite sides of the justably carry rollers across the machine in by solenoids bracket 209.

extending foris a bracket 250 machine to ad- 252 and 26$ transversely parallel relation with feed roller 4c. Roller is provided with an axle 255 which is mounted at its opposite ends in bearings 258 which are slidably mounted in slots 2553. These bearings are held in adjusted position by means or" screws 2 :8 adjustably mounted in bracket Ztll. Mounted on roller 252 is a roll of cover sheet 25d which is wound on the roller 255 provided with an axle 2'63 the ends of which exof feed rollers 26!! and 204 is fixed respectively to flange 234 of r tend into slots 210 formed in the outer end of racket D. Mounted on axle 255 at its oppoare friction driving discs 212 which,

idly mounted on axle 268 and in register with discs 2'12, whereby said cover sheet is held taut and wound onto the roller 266. To insure a driving relation between discs 2'12 and 214 a spring 216 secured at its one end to bracket 25!] carries a bearing block 211 at its free end to rest on axle 258 thereby urging the two sets of discs together sufiiciently to insure proper driving of the rollers 252 and 266.

Brackets 218 carried below the work bed I98 by the frame are similar to brackets 253i and serve a like purpose of carrying rollers 28!! and 282 in like manner and for the purpose of applying a coating of film 283 to the lower side of the work sheet W being fed to the machine. sheet W comprises a roll of sheet material 284 mounted on a shaft 285 which is mounted in the machine frame in parallel relation to the axes of the feed rollers and '32. This sheet material 284 is usually paper or some being fed to the machine about front rollers [36 by the pulling action of feed rollers 40 and 42.

By adjusting screws 248 to move bearings 258 in slots 25!! the tangent line of contact of film on roller 42 may be varied to heat the film to variious temperatures to obtain proper adhesion of the film to the work sheet 284. By raising the axle 256 farther above the plane of the work bed it is apparent that the film 252 will contact the heated periphery of roller 42 farther from the contact line of rollers at and 42, thus giving the film 262 a longer time to heat before it comes in contact with the work sheet 284. The same general effect may be had on film 283 by adjusting screws 248 in bracket 21%! to move axle 256 downwardly.

tation on a hollow, non-rotatable shaft or axle 4! which serves to carry the ball bearings 292, one disposed at each end of the roller to support it in operative alignment with roller 42. The inner ball race 294 is rigidly fixed to axle ll and the a pair of spaced apart end position by clamping nuts 304 which are screw threaded on axle 4i.

disc 3G2 by means of connector Eli. Referring to Fig. it will be noted that there are four similar heating units 369 in each end section 3M of roller and that each of the sections are long.- tudinally divided by a longitudinally disposed partition Z-ifi which is carried by axle Iii. By so positioning the heating units it is apparent that the heat is controlled to the various parts of the roller to which rotates thereabout when the machine is in operation.

By mounting the heating units on the stationary axle M, it is possible to make the proper wire connections thereto through the hollow axle where they can be properly controlled. The roller %:2 is constructed substantially as roller it and operates in conjunction therewith to draw the laminated and lamina-ting materials into the machine.

A series of treating or conditioning rollers 35B, 323 and 322 mounted at their opposite ends in left and right side frames respectively are dis posed in para lel relation with rollers 3% and Q2 and below rk bed @958. These treating rollers are mounted in horizontally adjustable bearings 323 sliclably mounted in openings 32% formed in frames it and with roller 3 i3 contacting roller MI and roller are positioned between rollers Bill and 322.

These rollers are all urged together by a compression spring positioned between bearing 32E of roller 322 and pressure blocks 332 which are urged thereagainst by screws tile mounted for adjustment in side frames 2%} and 122 respectively. By adjusting the tension of spring 333 the pressure between all the rollers 322, 329, M8 and to may be simultaneously adjusted to accommodate the thickness of the work being passed therethrough and also to the desired pressure against the worlz. It has been found convenient to so drive feed rollers and that the work will always be maintained taut during its travel through the conditioning rollers. This is accomplished by making the peripheral drive speed of the rollers its and Ell slightly greater than that of feed rollers All and 42.

Referring to 8 wherein is shown an elevational view of shears 333 which is located just to the rear of rollers so and 2, it will be noted that wort: bed 98 is slotted transversely at 333 provided with stationary shear plate 3%. A movable shear blade 3 52 mounted in blade frame 34 5 supported at its opposite ends by pins 346 to solenoid cores 318 is operatively mounted in sole noid coils which are rigidly fixed to side frames it and 22 respectively. Blade frame 344 is provided with cross bar which is normally positioned below the bed plate tilt. This cross bar has upwardly extending posts 354 which extend through slot 338 to normally support the shear blade 3 3.2 above bed plate 98 so that the work in its travel over the bed plate will pass between blade 3% and cross bar 352. Blade frame 3M is normally suppo. ed in the raised positions by compression spring 353, mounted on solenoid core t lt between solenoid coils 350 and cross bar 352. When solenoid coil 359 is energized, shear M2 is forced downwardly to cooperate with shear plate to shear the work in two.

To form a proper covering for the machine, the left side frame 2% and the right side frame 22 are respectively provided with cover sheets 358 and 35!]. Referring to Fig. 1 it will be noted that sheet 358 is provided with hinged doors 362 at its rear portion and a hinged door 364 at its lower front portion. The doors normally cover suitable moving table suitable apertures in 35?; which give access to storage space provided within the machine for receiving attachments for the machine, rolls of paper and film to be used with the machine, tools, etc. Also for the convenience of access to certain of the adjustments for the machine various openings are formed through the cover sheets.

lT'he laminator frame 53 is provided with side brackets 36% which are adapted to receive sup porting frames 3st for carrying various types of attachment for facilitating th proper operating of the 1-. iating machine.

amendment shown in the drawings is of a wort; smoothing device comprising frames 368 adapted to be fitted into brackets 35%. An arm are pivot-ally carried each of the frames 358 serves to rotatably support a rod 3?? across the work 5G5 Mounted on rod Zl'i'l for forced ustment therealong able rollers 3'13 which adapted to be pcs site edges of the sho rollers may be positioned on. eiaher oi rotation. .lt is intended, that these brackets may serve for supporting various tools such as work slitting rollers, rewinding tools, transverse sccri g means, etc.

Referring to a, it will noted that the brackets are each provided with lugs notched at 3% to serve as attaching means for various 'achments such as paste ers, solvent sprayers, etc.

adhesive sp- Worl: completed on the laininator is cut into sheets and iverezl to the rear of the machine in bundles on. a StzQkS-F: 7173; from which they are ada moved. An endless c belt .tiv r.i\..unted at its one end on a roller which, in turn, is rotatably mounted on brack ts carried by the frame IS.

Th belt 32% is relatively long and is mounted at its outer end on a driving roller which is rotatabl mounted on axle 382-7 standards of a fra member the base 33 of which is anchored to the floor at a distance from the laminator to present elongated :l'cr carrying a plurality of said or eets at a time that they may be inspected. by the operator. f rearwardiy and downwardly projecting table as anchored to the rear end of trains it terminates above the upper reach of the conveyor to the laminated sheets thereon.

lhe stacker ill-l comprises a universally adjustable box llis mounted on a standard rigidly fixed to base Standard comprises a base of tubular to a rod it-l. its upper end 3% universally connected with the bottom of box til The height of standard r32 variable and adapted to be fixed by means oz". a set screw i it. A guard menber M2 adjustably carried by standard 3% serves to direct the laminated sheets to the proper position in the receiving box. A motor mounted on base 385 serves as a power unit to drive roller 386 through motor shaft 256, speed reducer ill, sprocket wheel ile, sprocket chain and sprocket wheel w ion is fixed on roller axle 3138. Wires till and t2! connect motor with two wires iil and A switch 42?.- serves for manual opening and closing of wire M9.

Referring to the electrical diagram shown in Fig. 21, it will be noted that the line w es 12 i and 426 carry the C. current to the various electrical equipments which are used to control the heating elements, the driving of the movable parts, the cutting of the finished laminated trip and the separation of the feed rollers. Wires 42t-l39 connected respectively with line wires 324 and 425 serve to conduct the current to the various electric heating coils 312. Each coil 31s is connected in multiple with the line circuit by wires 332 and Wire :34 is manually opened and closed by means of a switch 433 whereby the heat units may be selectively energized to apply heat to the work at any desired intensity and for any desired period of the operation. A switch 53:! positioned in wire 431i is manually operable to control the current to the heaters 315. Wires 433 and 442 reaching from wires 42% and 42% respectively are connected in series with the two whereby both ends of roller 42 may be simultaneously raised to separate it from roller MB.

This separation of the rollers is manually controlled by means of the switch 442 which controls the current to the solenoids. If for any reason the feed rollers should stop, the heat to the work would become too intense to the detriment of the film used in the laminating operation. The lessening of the pressure between these rollers by a slight separation of the rollers will cause the heat to be more or less dissipated so that the work will not be injured. The shear 335 located in the path of travel of the work and just to the rear of feed rollers 43 and 42 is operated by sale noids which are disposed in parallel circuit uh line wires 42d and 526 by wires 44 and 445 between which the solenoids re connected by wires idd and 456. This circuit is controlled by a manually operable switch 452 positioned in wire The drive motor 193 is interconnected by wires and 453 to line wires 42% and 526, respectively.

4552- is opened and closed by means of a sv.tch 55;? whereby motor F623 is manually controlled.

The shear is forced to the cutting position by means of the solenoids 23% and 232, which are interconnected therewith. These solenoids are connected in series by means of wire 4559 conto one terminus of coil 232 to live wire 42 3, the other terminus of coil connected by P to one terminus of coil 238, and th op- 1e terminus of coil 233 being connected by 3-36 with line wire 425, including a source of which is energized through wires lit connected with feed wires 2 1 and 525. This circuit is opened and closed by a manually operable switch 4'55 positioned in wire 4'12. Re i ring to Fig. 2, it will be noted that the work W is provided with a series of windows or holes equally spaced alon one of its edges.

The highly sensitive switch comprises a selenium coil 430 in circuit with relay coil 482 by means of wires 484 and 486. An armature 483 pivoted at 530 is normally held in the open position by means is in alignment with selenium cell and the windows 413 in their natural course of travel register with the line of circuit to line wires 424 and 426, thus closing the circuits through solenoids 230 and 232 whereby blade will be moved to sever the work to form a finished sheet 498, which is ready to be delivered to the stack.

Cir

What I claim and desire to cover by Letters Patent is:

1. A laminating machine having a frame, a pair of cooperating tubular feed rollers mounted respectively for rotation on a pair of hollow axles fixed to said frame, a plurality of independently controlled heating units mounted on each of said axles within the respective rollers and spaced peripherally about said axle, partition members fixed to each of said shafts and dividing the space within the associated roller into segmental compartments each containing one or more of said heating units, and manually operable means to vary the pressure between said feed rollers.

2. A laminating machine having a frame, a pair or" cooperating tubular feed rollers, each mounted for rotation on an axle fixed to frame, a plurality of independently controlled heating units carried by the axles within the re spective feed rollers, means for driving said feed rollers in opposite directions, a series oi condt tioning rollers adapted to receive laminating material from said. feed rollers rotatably mounted for transverse movement in said cor pression spring adapted to constantly urge .d series of conditioning rollers together and against one of said feed rollers and a pair of feed rollers adapted to receive the laminated material from said series conditioning rollers, said last-nanied feed rollers being driven at a peri heral. speed slightly greater than the peripheral speed of first named feed rollers, whereby the laminating held under tension.

3. A laminating machine having a frame, including a work bed, a pair of cooperating tubular feed rollers each mounted for rotation on a hollow axle fixed against rotation in said frame, a plurality of heating units fixed to each of said axles, means for selectively controlling heatlog units extending from said hollow axle, means for driving said feed rollers in opposite directions, including spur gears interconnecting said rollers, means for guiding laminating strips to said feed rollers driven by one of said driven spur g rs, whereby work fed from said feed rollers w be moved across said work bed, a pair of feed rollers carried by said frame in spaced relation to said first named feed rollers and driven at a periph 1 speed greater than the peripheral of said first named feed rollers.

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date Re. 22,123 Edgerton June 23, 1942 1,514,288 I-Iynes NOV. 4, 1924 1,592,975 Hearn July 20, 1926 1,628,554 Pagano May 10, 1927 1,806,205 Kalgren May 19, 1931 1,912,709 Kane June 6, 1933 2,022,851 Galligan Dec. 3, 1935 2,047,372 Jalens July 14, 1936 2,154,474 Scott Apr. 18, 1939 2,274,150 Mack Feb. 24, 1942 2,321,647 Brougham et a1. June 15, 1943 2,339,492 Lewis Jan. 18, 1944 2,433,643 Beach Dec. 39, 1947 FOREIGN PATENTS Number Country Date 202,753 Great Britain Aug. 30, 1923

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