US1397489A - Method of and apparatus for gluing sheets edge to edge - Google Patents

Description

G. R. IVIEYERCURD.

METHOD 0F AND APPARATUS FOR GLUING SHEETS EDGE T0 EDGE.

APPLICATION FILED MAY 8. 1920.

11161161 Nov. 15, 1921..

3 SHEETS-SHEET I.

...NAW NMS OWN.

G. H. MEYERCORD.

METHOD 0F AND APPARATUS FOR GLUTNG SHEETS EDGE T0 EDGE.

APPLICATION FILED MAY8.1920.

1939)?9490 Patentd Nov. T59 1921.,

3 SHEETS-SHEET 2.

G. R. MEYERCORD.

METHOD 0F AND APPARATUS FOR GLUING SHEETS EDGE T0 EDGE. APPLICATION FILED MAY B', 1920.

1,397,489 mnteaNov. 15,1921n 3 SHEETS-SHEET 3.

GEORGE R. MEYERCORD, OF CHICAGO, ILLINOIS, ASSIGN OR T0 HASKELITE MANUFAC- TUBING CORPORATION, A COll'tPOlRATIONr OF NEW YORK.

METHOD OF ANI) APPARATUS FOR GLUING SHEETS EDGE T0 EDGE.

, remise.

To alt whomz't may concern:

Be it known that I, GEORGE R. MEYER- ooRD, a citizen ofthe United States, residing at Chicago, county of- Cook, State of Illinois, have invented a certain new and useful Improvement in Methods of and Apparatus for Gluing Sheets Edge to Edge, and declare the following to be a full, clear, and exact description of the same, such as will enable others skilled in the art to which it pertains to make and use the same, reference being had to the accom anying drawings, which form a part of this specification.

In makingply-wood sheets of any considerable size it is necessary toform each layer out of a plurality of pieces ari-an ed edge to edge, the several layers, after being built up, being then laid upon each other and placed in the ress. Because of the necessity of thus handling individual completed layers and in order to produce a satisfactory linished product, it is necessary that the abutting edges of the elements of each layer be effectively glued together.

Where the ply-wood is intended to be water-resistant, the glue joining the edges of the individual elements of each layer should be water-resistant. For rapidity of production the best glue forthis purpose is that made of blood albumin which will set in avery short time under the influence of heat; it being sufficient, of course, that the heat be applied locally, that is simply in the vicinity of the joint which is being made.

The object of the present invention is to produce a simple and novel method of and machine for gluing together the abutting edges of two sheets, such as wood veneering, in such a manner that heat and pressure will be eficiently applied to the joint in order that the work may be done expeditiously and effectively.

The various features of novelty whereby my invention is characterized will hereinafter be pointed out with particularity in the claims; but, for a full understanding of my invention and of its object. and advantages, reference may be had to the following detailed description taken in connection with the accompanying drawings, wherein:

F ign-re 1 is a top plan view of a machine arranged in accordance with a preferred form of my invention:

Specification of Letters Patent.

porting rail;

Patented Nov. l5, i921.

Application led May 8, 1920. Serial No. 379,770.

Fig. 2 'is a side elevation of the machine:

Fig. 3 is an end View, on a larger scale;

Fig. 4 is a transverse section on the saine scaleas Fig. 3, the parts being in the same positions as in Fig. 3-

F ig. 5 is a view similar to Fig. 4, the parts being shown in the positions which they occupy when the machine is closed on the work.

Fig. 6 is a sectionl on an taken on line 6 6 of Fig. 3;

Fig. 7 is a transverse section through the upper heating element, on an enlarged sca. e;

Fig. 8 is a transverse section through a modified form of supporting platform or table;

Fig. 9 is a View similar to Fig. 7 showing a still further modification; and

Fig. 10 is a top plan View of a fragment of the table shown in Figs. 7 and 8.

Referring' to Figs. l to 7 of the drawings, l and -2 represent two long flat bars lying parallel with eachother and having their upper faces in the same horizontal plane. The members l and 2 lie above and are spaced apart from rigid supporting rails, 3; there being a series of coiled springs, 4, between each of the bars l and 2 and the corresponding supporting rail. In the arrangement shown, there are bolts, 5, fixed at their upper ends to the bars l and 2, each bolt passing down through one of the springs and through the underlying supthere being a nut, 6, on the lower 'end of each bolt by means of which the springs are placed under an initial tension so that they will not yield and permit the bars toI be depressed until a downward pressure of .a predetermined strength is applied to the bars. rIhe rails are supported at their ends by a suitable stationary frame of which only parts of the two ends, 7, are shown. Across the tops of the bars l and 2 extends a plate, 8, preferably of comparatively tliin sheet metal such as brass; this plate serving as the immediate supporting surface for the work. Above the bars l and 2 are two rigid bars, 9 and 10, movably supported so that they can be shifted in the vertical direction and also from and toward each other. Underneath the plate between the bars l and 2 is a heater, l1, there being enlarged scale of ninety degrees t plate, 8,`be prevented from striking the side of the heating element or the inner face of one of the bars and be arrested thereby. This may conveniently be brought about by making the heating element, 12, flat' on the bottom and providing it with laterallyprojecting fingers, 14, -in the plane of the bottom; these fingers being long enough to enter notches or grooves, 15, in the `bottom upon the work, the bars being then moved toward each other so as to tend to move the .i

so that the subsequent action of the movable j bars will move'the two pieces of veneer far enough to close the gap between them. When the work has been clamped in the machine in the-,manner explained, the 'surfaces to be glued together will be held` in contact with each other under considerable pressure and,-

' at the same time, heat will be applied locally,

faces of the bars 9 ,and 10. This arrange'-l ment permits the bars 9 and '10 to move toward each other without producing what might be termed a gap in the upper clamp* ing surface of the machine.

The bars 9 and 10 may be supported in any suitable way'which will permit them to v be moved downwardly and inwardly from their elevated positions. In the arrangement shown, each of the two movable bars is supported at its ends by crank-like devices which, when turned through an angle tions. As best shown in Fig. 6 there are rotary studs or stub shafts, 16, journaled inY and projecting through the end wall, 7, of

or less, shift the bars in` both the vertical and the horizontal directhe frame of the machine at the ends of Ythe bars 9 and 10. On the inner end of each of the members 16, and eccentrically disy'posed with respect to the axis thereof, is a projecting p in, 17, which enters a slot, 18, in

, the adjacent end of the corresponding bar;

the slot being elongated transversely for a purpose to be hereinafter explained. On the outer end of each of the members 16 is fixed an operating handle or lever, 19.. The parts are so proportioned that when 'the operating levers are raised into the positions shown in Figs. 3 and 4, the bars 9 and 10 are held `raised above the 'plate 8. When the operating levers are thrown outwardly ,and downwardly into the ositions illustrated in Fig. 5, the movable ars are swung downwardly and toward each other.

In using the machine, it is first opened by raising all four of the operating levers, steam or any other heating medium being applied to the heating elements; two sheets of veneer or the like, whose edges are to be glued together, are laid upon the supporting plate, 8, as indicated at A and B in Fig. 4, after glue has been applied to the two edges to be joined; and the operating levers are then swung down, causing the movable bars and the upper heating element to be lowered and an effective union of the two pieces 'of j veneer.

The supporting plate, 8, is preferably made ,smooth while the bottom faces of the movable bars are preferably roughened slightly as indicated at 20, so that these bars will be capable of exerting a sufficient tractive ef' fort on the sheets of veneer to induce the latter to slide onthe supporting plate. The grip on the veneer should not be so strong as to cause it to be crushed. Furthermore, there should be a uniform distribution of pressure throughout thel entire length of the veneer and, in case the adjacent edges of two sheets of veneer touch each other at some points and not at others, it should be possible for slippage to occur between the work and the gripping or clamping elements so as to permit gaps in the joint to be closed after contact has been obtained between the `ing pins, 17, vfor these bars to play in trans- -versely-elongated. slots instead of in simple round holes, there is a lost motion between the actuating levers and the bars so that during the first part of the movement of these levers toward their releasea position, they do not influence the movable bars but simplyrelease the pressure thereon and permit them to let go of the work simply by a y raising of the forces left free to act when the restraining influence of the actuating levers is removed. This release of the grip of the movable bars on the work may be ,heating unit, l2,

. adjustable stops,

insured b means of the light leaf springs, 22, place between the sides of the upper and the movable clamping bars which support the same; these springs serving to hold the heating element in a cen` tral position and at the same time exerting a gentle pressure in a direction tending to spread the clamping bars apart.

. The movable clamping bars are supported only by the pins which actuate them, in the arrangementshown, and therefore it is desirable to provide some means to hold them in proper relation to each other and the rest of the machine. This may conveniently be accomplished by connecting -the bars together by means of a link, 24, lying above the same and pivotally connected at its ends, as indicated at 25, 25, to the barsy or to suitable ears or brackets, 27, fastened to the bars. I

This device prevents the bars from tilting relatively to each other, but holds them upright and parallel with each other while permitting them to move from and toward each other.

It may sometimes be desirable to permit the lower supporting bars to move toward each other during the closing of the machine on the work. This may conveniently be accomplished, as illustrated in Fig. 8, by mounting such bars, as indicated at 30 and 3l, on the upper ends of spring rods or strips, 32, which bendunder the influence of the diagonally-applied forces resulting from the downward and inward movement of the upper bars. Or, if desired, the two bars, as indicated at 33 and 34 in Fig. 9, may be supported on the upper endsofswinging struts, 35, so arranged that the bars tend by gravity to swing downwardly and toward each other; the bars being normally held in their raised positions by means of an intervening leaf spring, 36, which presses them upwardly and outwardly against suitable 37. A simple downward pressure on these bars will cause them to swing downwardly and toward each other. Where the lower bars are movable from and toward each other, the work-supporting plate must be made otherwise than in the form of the machine illustrated in Figs. 1 to 7.- The work-supporting plate may conveniently be made as illustrated in Fig. 10; being in the form of two plates, 38 and 39, having intercalated fingers, 40 and 41, which maintain the continuity of the supporting surface while permitting the bars to which they are attached to move from and toward each other.

While I have illustrated and described with particularity only a single preferred form of my invention, with a few simple modifications, I do not desire to be limited to the exact structural details thus illus-A trated and described; but intend to cover all forms and arrangements which 'come within the terms employed in the definitions of my invention constituting the appended claims.

I claim:

1. In a machine -of the character de` scribed, a fiat work support yieldable in the downward direction under pressure, a clamping element for holding a sheet on said support, a second clamping element lying above said support, and actuating means constructed and arranged to move the latter element up and down and simultaneously move it from and toward the first clamping element.

2. In a machine of the character described, a work support having a heated zone, two parallel clamping bars lying above said support on opposite sides of said zone, a heating element loosely supported between said bars above said zone, and means for moving said bars downwardly toward said support and laterally toward each other.

3. In a machine of the character described, a vertical yieldable work support having a zone adapted to be heated, parallel clamping bars arranged above said support on opposite sides of said zone, a heater lying between and supported by said bars, and means for moving said bars from and toward each otherland also from and toward said support.

4. A machine of the character described which consists of two pairs of clamping devices, and means for closing said devices upon two sheets to be glued together and simultaneously moving them toward each other.

5. A machine of the character described which consists of a flat workl support, a clamping element for holding the sheet on the support, a second clamping element, and means for moving said second element toward said support and at the Same time along the same toward the other clamp.

6. A machine of the character described which 4consists of a Hat work support, a clamping element for holding the sheet on the support, a second clamping element, means for moving said second element toward said support and at the same time along the same toward the other clamp, and a heater between said clamping elements.

7. A machine of the character described comprising a yieldable support, a clamping element for holding a sheet on said support, a second clamping element lying above said support, and actuating means constructed and arranged to move the latter element up and down and also from and toward the rst clamping element.

8. A machineof the character described comprising a yieldable work support, a clamping element for holding a sheet on said support, a second clamping element lying above said support, actuating means constructed and arranged to move the one of said clamping elements toward said support and also toward the other clamping element, and heating means in the zone between said clamping elements.

9. A machine of the character described comprising a flat work support, a clamping element for holding a sheet on said support, a second clamping element lying above said Support, supporting cranks at the ends of said second clamping element, and means for turning said cranks so as to move the latter element up and down and also from and toward the first clamping element.

10. In a machine of the character described, two long iat parallel rails, springs.

beneath said rails for supporting the same, a heater arranged between and supported by the rails and having its upper surface flush. with the tops of the rails, two parallel clamping bars arranged above said rails, a heater lying between and loosely supported by said clamping bars and having a flat bottom adapted to extend downwardly at least as far as" the bottoms of the clamping bars,

and means for moving said clamping bars from and toward each other and also from and toward said rails.

11. In a machine of the character described, two elongated parallel rails, springs distributed along each rail underneath the same to support it, a comparatively thin metal plate resting on said rails, ,a heater on the under side of said plate between said rails, and cooperating clamping and heating means arranged above said plate.

12. ln a machine of the -character dei scribed, two elongated parallel rails, springs distributed along each rail underneath the same to support it, a comparatively thin metal plate resting on said rails, a heater on the under side of said plate between said rails, parallel clamping bars arranged above said plate, a heater suspendedbetween said clamping bars, and means for moving said clamping bars from and toward each other and also from and toward said plate.

In testimony whereof, I sign this specification.

GEORGE R. ME-YERCORD.

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