US 1988208 A
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Jan. 15, 1935. L. c. MARTIN 1,988,208
BOOKBINDING MACHINE AN'D METHOD Filed April 16, 1934 Patented Jan. 15, 1935 UNITED STATES 1.988.208 y nooxmnmc MACHINE AND ME'rnoD Laurance C. Martin, Chicago, Ill., assignor to Martin Machinery Corporation, New York,
Y., a corporation of New York Application April 16, 1934, ySerial No. 720,902
This invention relates to improvements in bookbinding machines and method of bookbinding and is more especially applicable to that form of binding, accomplished without stitching or 5 stapling, where a plurality of sheets have their edges glued together.
In this form of binding, a plurality of sheets are clamped together, the edges to be bound are trimmed and then roughened, and the glue is then applied. In the practice of this method, however, in the past, two diiliculties have been encountered. In the first place, the roughening means, usually a saw, in performing its work, leaves some dust on the edges of the sheets. This dust has interfered with the proper application of the glue. In the second place, it has been found dimcult or impossible to secure the proper penetration of the glue between' the sheets. A thin glue is ordinarily used to hold the sheets together and to do this it ought to penetrate between the sheets for a short distance from the edges. The sheets have to be clamped together rather securely, however, and this clamping has prevented the proper penetration ofthe glue.
By the practice of my invention, both of the objections mentioned above arelessened or eliminated. I provide means for effectively removing the dust left by the roughening means. In general, this in'cludes a suction nozzle following the roughening means. I also contemplate placing the suction nozzle just ahead of the glue applicator. I believe that if this is done, there may be temporarily created a reduced pressure between the sheets for a short distance from the edges. With a proper speed then, the sheets may be moved to the glue applicator so that re-entry of air following the suction means will cause the glue to penetrate properly between the sheets.
Other features and advantages of my invention will appear more fully as I proceed with my specivIcation.
In that form of device embodying the features of my invention shown in the accompanying drawing- Figure l is a view taken as indicated by the line 1 of Fig. 2; and Fig. 2 is a view in side elevation.
As shown in the drawing, A, B and C indicate groups of sheets to be bound into books. The sheets of each group are held together by suitable clamp members, the details of the necessary clamping mechanism not being shown. Suitable means, well known in the art, are provided for moving or feeding the groups of sheets, at the required speed, in the direction indicated by the arrow, so that they will pass in sequence over the cutter or trimmer, roughening device, suction means, and glue applicator.
The cutter or trimmer is here shown as a circular knife indicated by 11.
l'I'he roughening device is a circular saw 12, the upwardly pointing teeth 12l of which engage the edges of the sheets to roughen them so that the glue will adhere better.
'Ihe suction means is indicated by 13. This may be a suction nozzle similar to that used on a suction or vacuum cleaner. The mouth of the nozzle may be provided with a sliding orice plate 14 so that the effective opening ofthe nozzle may be adjusted to t books or groups of sheets of different thicknesses. It is to be understood that suitable means (not shown) are providedk for exhausting air from the nozzle in the direction indit cated by the arrows to give the requisite low pressure or vsuction in the nozzle. As stated in the fore part of the specication, this nozzle removes the dust left on the edges of the sheets by the saw 12, and possibly may aid the penetration of the glue by temporarily reducing the air pressure between the sheets adjacent their edges.
Immediately following the suction nozzle is the glue applicator, here shown as a rotating drum 15 dipping into the glue container 16 holding the liquid glue 17. The upper edge of the drum applies glue to the edges of the sheets. 18 is a scraper to remove excess glue from the drum.
While I have shown and described certain embodiments of my invention, it is to be understood that it is capable of many modifications. Changes, therefore, in the construction and arrangement may be made without departing from the spirit and scope of the invention as disclosed in the appended claims, in which it is my intention to claim all novelty inherent in my invention, as broadly as permissible, in view of the prior art. A
What I claim as new, and desire to secure by Letters Patent, is: e
1. A bookbinding machine, including; means for clamping a plurality of sheets; means for roughening the edges to be bound; suction means for removing the dust left by such roughening means; and means for applying glue to the edges.
2. A bookbinding machine, including; meansv for clamping a plurality of sheets; means for roughening the edges to be bound; suction means for removing the dust left by such roughening means; and means for applying glue to the edges vso immediately after the operation of the suction 55 means, whereby reentry of sir between thel sheets aids the penetration oi' the slue.
3. The method oi binding books, `comprising: clamping the sheets: rougheninz the edges to be 5 bound; removing the dust (left by the roughening means) by suction means; and applying glue. 4. The method oi binding books, comprising;
:,ossms clampinsthesheets: Nutheninzthe edzestobebound; removing the dust (left by the roughen- 'ing means) by motion means; and immediately thereafter applying glue so that re-entry of air between the sheets will sid the penetration ot the s ue.
LAURANCE C. MARTIN.