US106391A - Improvement in veneering-fress - Google Patents

Description

tlnimt sans JOHN MOREQOF NEW YORK, N. Y..

Letters Patent No'. 106,391, dated August 16,v 1870.

IMPROVEMENT IN VENEAIElRING-PRESS.

The Schedule referred td in these Letters' Patentand making part of the same.-

To all whoml it inap concern: l

Be it known that I, JOHN MORE, of theiiirm of y Duke &Morebuilders, in the city of New York, have invented certain new and useful Improvements in Means for Veneeriug;l and I do hereby' declarethe following is a full and exact description thereof.

My improvements are intended to avoid much of Y the difficulty now experienced in holdingT venecred "work rigidly in position while heilig secured together,

audl use improved clamps, adapted to be applied to and removed from such bench.

I will first describe what I consider the best means of carrying out my invention, and will afterward desi gnate the points or features which I believe to be new.

The accompanying dra-wing forms a part of' this specitication.

Figure l is a side elevation, and

Figure 2 is a cross-'section-of a set of layers of vene'ered work vand cawls held stifily in position according to my invention,

Similar letters of reference indicate like parts in all the figures. Y v

A represents a stout vork-bench, composed in part or entirely ot' wood, if preferred, but in such case employing well-seasoned material, and truing the top and sides again after it has been tirmly put together, and

'has had time to season further and assume its final form.

Its upper surface is exactly plane, and of uniform breadth throughout itswhole extent.

' There is a groove, a, on cach side, parallel with the upper surface.

-B -is theglower half of a stout clamp, and

' )er half thereof.

spare drawn together by strong screws have two collars acting against the upper and undeIces of the upper half, C, and are tapped through st''u't casin gs, which I will term hooks, marked B B',' s,ecured on the lower faces of the lower halves, B.. The hooks are adapted to tit the edges of the to/take hohl in the grooves o, as repret fr. 2.

sented .i a

The inner faces of both the halves B C are bellied or swelled, as represented, so that when,the clamps are-pressed together upon work in which the glue is soft, the pressure, being applied rst in the center, will drive the excess `of glue toward thc edges. As the` clamps are drawn together with more force, the halves B and (l bend under the strain, so that, finally, the edges of the work which is clamped are compressed. It is possible, -by acting very powerfully ou the screws D, to ultimately squeeze the veueered work at the edges more tightly than at the center, butin all cases the work is first `compressed with the greatest force at the center, thus forcing out the glue. 4

I provide a considerable number of these clamps, all exactly alike. Each is adapted to fit upon the bench A, as represented, and, as the action`of the screws does not compress the hooks upon the bench, but only draws the parts B and C together or releases them without att'ecting the tightness of the fit of the hooks, it is always possible to remove the entire set, comprising any number of clamps, from the bench, after the work has been rigidly and straightly clamped together.- l

I propose to use hot cawls, curved or otherwise adapted to the form of the surfaces to be veneer-ed, as usual.

In 'describing the operation, I will assume that the work to beveneered are thin, plane pieces of wood. The cawls will in such case be plane.l They may be made of wood, as usual.

I have represented cawls in the drawing by X, Vand have represented the body ofthe wood by M and the veneers in.

Operation.

Fit a number of the clamps upon thefwork-bench, by taking them up one by one, placing them properly against the end of the bench, and sliding them along. If a 4sufficient number of clamps be provided they may be placed very close together, so as to almost, if not quite, touch each other,` but in such case the screws must obviously be operated by box-keys or some analogous means. The means represented, a sliding cross-bar, may be used in cases where the clamps are placed at a reasonable distance apart.

Having adjusted the clamps iu position upon the bench, and the cawls being previously heated, the wood M is brushed over with hot glue, and the veneers adjusted in position thereon, with paper laid over the exterior' of the surfaces in the ordinary manner. Now a stout board or cawl is laid within the clamps, being placed directly upon the upper face of the lower half, 1:".4 rIhen one layer of the freshlyglued work is laid thereon, another cawl is applied,

another layer of fresh work, and thus we go on alter natiug cawls and work until another thick cawl is laid on the upper surface, nearly iilling the clamps. Now the screws D are operated until a -sensible resistance is experienced. lt `is wellto bring all the clamps to this condition rapidly, and thence thereafter to operate more-slowly, giving the glue time to exude gradually atthe edges of the Work as the screws D aregradually set up tighter and tighter. A proper tension must be obtained on the whole before the work has cooled to any great extent.

Now, after waiting alittle time, depending on the haste with which the bench is required for subsequent operations, tle entire series of clamps, with their contained work, is drawn off endwise from the bench and laid aside, to allow the work to thoroughly harden, while another set of clamps is placed in position on the bench and more work is similarly treated. The work being irmly held in position while being compressed, will not afterward curl ortwstseriously, even if the clamps` are removed immediately lfrom the bench.

I claimv The clamp, composed of the parts B C, and screws D, and nuts B', constructed, arranged, and operating in the manner herein described, and for the purpose herein set forth.

In testimony whereof I have hereunto set mynanie in presence of two subscribing witnesses.

. JOHN MORE.

Witnesses WM. C. DEY, L. P. WHITEHEAD.

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