US2084676A - Machine for the gluing together of the edges of veneer sheets - Google Patents

Description

4 Sheets-Sheet -1 A. FRIZ' A-Iileduay e, 19:56

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= MACHINE EER THE GLUING'TOGETHER '0E THE EDGEs oF VENEEE sHEETs o o o o o. .IIN

. ll l l I VIIIIIIIII.-IIIIIIIIIIIIIII IIIII |I IIIIIIIIIlIIlIIIIII I IL A. FRlZ `lune 22, 1937.

MACHINE FOR THE GLUING TOGETHER OF THE EDGES OF' VENEER `SHEETS E Filed'My `6, 1936 I 4 Sheets-Sheet 2 A. FRIZ MACHINEFOR THE GLUING TOGETHER .OF THE' EDGES OF VENER SHEETS l Filed May 6, 1956 4 Sheets-Sheet I5v A. FRlz 2,084,676 MACHINE FOR THE GLUINGv TOGETHER OF THE EDQES OF vEN'EER SHEETS June 22, 1937.l

-' Filed. May 6, 1936 4vShee11S-Shee1l v4l if l Patented June 22, 1937 UNITI-.fo STATE-s PATENT oel-ICE MACHINE Foa -My invention relates to the assembling of veneer sheets and has particular reference to a machine for assembling and Jointing, by means ofan adhesive, the edges of adjoining sheets Kligthout taking recourse to 'paper strips or the e. As is well known tothose skilled in the art,in `the machines hitherto employed for this purpose, before the veneer sheets couldbe assembled, l0 either glue or a means for making the glue set had to be deposited on the edges of the sheet and left todry. If the glue vwas first -deposited on the sheets, the glued edge portions were moistened in the machine with a .setting agent. On the v other. hand, if the setting agent were/applied first, the depositing of the glue on the edges of the sheet was effected in the-machine. In any case a preliminary treatment of the sheet edges to. be glued together was required.

I have succeeded in altogether avoiding this preliminary treatment andv to^carry through the preliminary deposition as well as the drying and subsequent deposition of the gluing or setting material in a single operation and by means of a y single machine, so that the veneer sheets fed into the machinemerely pass once through the machine and leave it in finished condition.

To this end, I provide the machine with means whereby the veneer -sheets are uniformly` fed through the machinefthroughout the treatment in question, and this in such manner that a gap 'is first left between them in which the glueor the v -setting agent is deposited on the edges, to be thereafter dried by meansof a' current of hot air, whereupon the setting agent (orinversely first the setting agent and thereafter the glue) is applied. The veneer sheets are then closed, assembled and pass through the gluing space proper in close iuxtapositionw .40 m the drawings animaron-11s' specification and forming part thereof two forms of a machine embodying my invention are illustrated diagrammatically by way of example. In the drawings z Fig. 1 is a front elevation and 4g Fig. 2 a side elevation of the first modificatiom 'rua GLUING 'rooE'rnEa or' 'ma andas or' vaNEEa smzn'rs` Adour' nu, stuttgart-naa camisa. Germany- .application May s. 193s, serial No. raras. In Germany May 13, 1935 z claim. (ci. 14a-21a) ,REISS'UED oct se' 1.940

Referring to the drawings and first to Figs. 1-5, I is the machine table and 2 is a depression or channel extending longitudinally of the table, while 3 is a conveyer chain passing over sprockets I and! andextending through the channel 2. The sprocket 4 is driven by an electromotor 6, sprocket I and chain I 'in the direction of the arrow. Froma sprocket l mounted on the shaft of the sprocket l a shaft 'IVI is'driVen by means of a chain I0, this shaft carrying a glue depositing disk b mounted between two rollers d slightly pro, jecting above the table surface, the disk b running in the glue tank a. An arm I2 on the machine supports a number of rollers serving to exert pressurev from above onto the veneer sheets Il tobe treated, these rollers extending above the conveyer chain 3. Rollers c arranged above the rollers d slightly converging in .the direction of In the direction of feed there now follow several pairs of rollers'f which are disposed exactly.

in the direction of feed and thus maintain the veneer sheets in spaced relation with a gap I4 between them, the width of which is-determined by the thickness of the disk b. On the arm I2 is disposed above thegap Il a heater g heated by' steam, by electricity or by some other means and which extends downwardly in close vicinity to the veneer sheets I I. but isV formed directly above the gap Il with a channel I6, through which hot air may be blown by means of a tube r ,heated by a heater n of some suitable typeand fed with hot air by a fan lc which is preferably mounte f on the shaft of the electromotor 8.

- In the direction of feed pairs of obliquely ary ranged rollers s are provided to the rear of. the

the parte adjoining the gap. v

Figi. 3 beingla cross-sectional view, drawn to a larger scale, of a detail of Fig. 2, while Fig. 4 is asectiononthe linedinFig. 1. Fig. 5 is a diagram corresponding to Fig. 4

so which shows the way in which the veneer sheets travel through the machine. a Fig. 6 is a side elevation viication. Fig.fff'llis a correspondingjfrontyiew. gs Fig. illustrates al detaily of the second modi- The converging rollers s disposed te the rear of .this device press the sheets II against each other while feeding them along. Above the glued lIoint is arranged another heating device g' serving to dry the glue in thel Joint.

Under the influence oi' pressure and heat the glue deposited on the edges of the sheets now sets, being influenced by the setting agent.

As mentioned above'either 'the glueor the setting agent may be Supplied by the ydisk b and similarly either the setting agent or the glue may be deposited by the disk o.

,I may use glue to which the setting agent has previously been ladded and in that case konly the v depositing device near the feed end of the machine, of. which the disk b forms a part, need be used, while the depositing device in the middle. of which the disk o forms part, may be dispensed with. The lsame applies to the case where a glue is used, which does not require the addition of any setting agent. Y In the modification illustrated in Figs. 6 to 8 the device for pressing the sheet edges against each other is arranged nearer to the glue depositmachine.

ing disk, so as to act already on the sheets at the point where the glue and/or setting agent are deposited thereon. In the space between the pairs of rollers serving to press the sheets against each other and the rollers following them means for holding the sheets down on the table, preferably in the form of a correspondingly shaped metal plate, may be provided, which covers the marginal portions of the sheets to be assembled at those places where the rollers cannot act directly on the sheets.

Here again an endless chainb extends through 'thed channel a in the working table and is driven of the sheets to be assembled.

A,0n eitherq side of this glue depositing disk are provided drive rollers i serving to press the sheets against each other, these rollers being preferably mounted on the same shaft as the disk g. bove the rollers are mounted pressure rollers lc. Ow-

that its middleportion extends between the ing to this arrangement the sheets are alreadyy safely held in the vicinity of the point where the glue is deposited and ,are pressed correctly against the glue depositing disk.

In order to prevent the sheets from following up or from overlapping each other, a metal plate m is arranged between the rollers c, which adjoins lthe bottom edgeof the heater n, and as shown for instance in Fig. 8, is cut out in such manner 'rollers o'f thepairs zrof rollers, Vwhile lateral projections o project between consecutive pairs, of rollers.

The rollers k and preferablyalso the first rollers care preferably arranged in slightly converging position, ,so that they tend` to press the veneer sheets against each other.

It is essential that the pressing rollers 'acting near the glue depositing device be driven. On

the other hand the glue depositing disk g might also be loose on the driven shaft andl might be carried along by the sheet edges.

.Adevice according to this invention operatesabout 4as follows:

The veneer sheets are fed in spaced relation to the glue supplying disk b being carriedalong by the rollers d and held down on these latter by agent, if any such agent is required, is suppliedfrom the container q by means of the disk o,

whereupon the. sheets are gripped by the rows of converging rollers s and forced against each other, another heating device such as g' acting on the glued joint. v

I wish it to beV understood that I do not desire to be limited to the exact details of construction shown and described for obvious modifications will occur to a person skilled in the art.

l. A vmachine for'edgewise gluing veneer sheets together, comprising in combination, veneer sheet conveying means, a binder supplying means in front of said conveying means, two converging rollers flanking said glue supplyingmeans, a plurality of pairs of parallel rollers arranged behind said converging rollers and a plurality of conl vergingrollers arranged in series with said parallel rollers.

2. A machine for edgewise gluing veneer sheets together, comprising in combination, lveneer` sheet conveying means, a binder supplyingneans in front of said conveying means, two converging rollers flanking said glue supplying means, a plu- ,rality4 of pairs of parallel rollers arranged be

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