DE2065731A1 - Apparatus for prefolding book protective covers - with heated folding prongs placed above silicone rubber supporting cushion - Google Patents

Abstract

Appts. for prefolding book protective covers has a stamping station with two heated, simultaneously operating folding prongs, each of which is equipped with double cutters sloping outwards at an angle of 30-45 degrees in the direction of the cover edge. Rapid, accurate folding of the protective cover is obtd. so that it can be presented for placing on the book.

Description

Dipl.-Ing. Wilfrid RAEOK 2 0 6 5/3 I.

PATENT ADVOCATE
7 STUTTGART 1, MOSERSTRASSE 8 -TELEPHONE (0711) 244003

Removal from patent application

P 20 08 135.0-27 of Feb. 21, 1970 - S 235a -

Device for pre-folding protective book covers

The invention relates to a machine for folding title covers (Dust jackets) around Büher »in which the supplied books with their backs down each on one pre-folded envelope is placed on it and then the envelope flaps are turned over during a joint longitudinal feed movement the book covers are thrown over.

The invention is based on the object of improving known methods and machines in this field in such a way that continuous cycle processing of books M is possible without time-consuming adjustments of the machine and a significant part of the process of connecting the dust jackets and 'book covers with a preparatory pre-fold is carried out.

To solve this problem in a machine of the type specified, the invention proposes that the lying envelopes, the flaps of which are first erected by hot stamping the folds by about 90 °, while the subsequent longitudinal feed movement in each case with respect to a book that is guided at a distance above and / or inclined

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be aligned, followed by the upper one, by about 90 ° opened book cover the corresponding flap of the unilaterally raised and still transverse to the book independently movable cover is folded over, while then the book spine is placed on the cover and the book is turned towards the open cover, whereupon the other cover is opened in the same way as well and the book is turned back on the opened book cover.

The invention is based on an embodiment of a machine shown in the figures for execution of the procedure explained in more detail. Show it

1 shows a schematic overview of the method and

the device according to the invention, Fig. 2 the folding or embossing station according to a

Section along the line I-I in Fig. 1, Fig. 2a an enlarged representation of a folding blade.

The dust jackets S are lifted individually from a stack 10 by a sheet feeder by suction and with the help longitudinally guided pincer gripper 11 in an embossing station 12 ^ · (Fig. 2) conveyed, in which they are on a grate 13 and in ^ Area of the folds to be made on upholstery 14 Rest silicone rubber, which according to FIG. 2 consist of cylindrical or roller-shaped structures, the axes of which run parallel to the folds to be made. The folding and thus the formation of the envelope flaps Kl, K2 takes place by heated double swords 15, which are each bent outwards by approx. 30 ° to 45 °. the Hot stamping achieved with the double swords produces a shrinkage of the paper in order to keep the To reach the flap of at least 90 °.

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The double sword shown in an enlarged section in FIG. 2a can be provided with an adjustable cutting edge 16 for adapting the double-fold embossing to different thicknesses d of the book covers. One screw 17 runs through an elongated hole 18, while the other screw 19 is used to secure the clamp. Both the folding blades 15 and the cushions I ¹ I can be displaced and locked in the transverse direction in support rails 20 and 21, respectively, with the upper support rail 20 being able to be moved downwards to carry out the fold.

From the embossing station 12, the envelopes S are through Driver 22 discharged, which are arranged at regular intervals on a double arranged under the feed path Longitudinal conveyor chain 23 are attached. On the subsequent feed path, the dust jacket S is first on his one side is raised by guide rails on an inclined longitudinal wall 24 and remains on on the other side the erected and preferably temporarily further bent envelope flap K2 guided laterally on one Appendix 25. - ■

An incoming dust jacket S moves under the ^ m

Slide channel 28 over, remains with the laterally guided Envelope flap K2 below the chute 26 and is on its other side by guide rails on the Slide opposite inclined wall 24 raised.

During this process, the next to the slide channel upwardly protruding driver 22 capture the rear edge of the Book, the upper book cover Dl now opened with the help of articulated suckers 29 and during the advance is guided behind corresponding hinged guide rails, not shown, which keep the book cover open. The open

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The book is also promoted by the dust jacket S. Driver 22 aligned with the dust jacket during the longitudinal feed movement. With the help of the same feed finger or driver is thus initially a separate management of the book and dust jacket in different Heights.

The cover flap Kl is now folded over around the opened book cover Dl, through a hollow rail 30 provided with blown air nozzles, which during the advance over the length of the book cover Dl exerts a downward painting movement ^{above the inclined longitudinal wall 2 1 I.} At this point in time, the dust jacket S can move transversely to the direction of advance relative to the book and align itself with respect to the opened book cover D1, since the contact rail 25 opens laterally here. In this way, a clean-fitting dust jacket is created »

At the point where the flap is folded over and rests on the inside of the book cover Dl, the slide channel 28 supporting the spine ends, so that the book B is now rests with its back on the envelope S. An offset in the longitudinal direction is not possible because the drivers 22 have already carried out the mutual alignment beforehand and will continue to maintain it. The transition of the The spine of the book from the slide channel 28 to the dust jacket is continuous or very gradual as the The end of the slide channel is pointed and sharpened and in this way the vertical distance between the spine of the book and the top of the dust jacket is small is. The slide channel must stop at this point so that when the book slams onto the cover Dl, the cover is closed can move with the book.

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The hot stamping carried out on the dust jackets from the start gives the fold such strength, that the Umfaltvorgang with the help of the downward stroking movement of the hollow rail 30, 35 then still can be done properly when the unfolded Book cover does not extend to the fold edges produced by hot stamping. In fact, with that method according to the invention the requirement that between There is a sufficient gap between the edge of the opened book cover D2 and the second cover flap K2 to be folded over, so that inadmissible tensions in the dust jacket are avoided when the book is closed and only then the desired tight fit of the dust jacket around the book cover and the spine is guaranteed is.

The book can be turned back onto the opened book cover D2 by means of guide rails, with during this turning process the necessary compensating relative movement between the book cover and the dust jacket it is easily and securely guaranteed that the heavy book block only at the last moment before the full closing of the book on the. folded envelope flap rests on this is therefore free to perform a relative movement beforehand, (0

The slamming or closing of the book can also be done with a cam-controlled lever instead of a guardrail done with a Nachschieberolle 36, which is expedient is used when, during the closing process, a relative movement occurring in the longitudinal direction between Dust jacket and book should be feared. The roller 36 is provided with an annular collar 37 which is attached to the The rear edge of the book cover Dl and dust jacket S is in contact and the pivoting or »rolling movement synchronized with the feed movement the conveyor chain 23 carries out »

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Claims (4)

PATENT ADVERTISER 7 STUTTGART 1, MOSERSTRASSE 8 TELEPHONE (0711) 244003 - S 235a - claims 1.Device for pre-folding protective book covers, characterized by an embossing station (12) with two heated, simultaneously operated folding blades (15) with double cutting edges (16) inclined outwards towards the edge of the envelope at an angle between 30 ° and 45 °. 2. Apparatus according to claim 1, characterized in that in the embossing station (12) under the folding blades (15) as a folded base silicone rubber pad with a curved surface running parallel to the machine direction (14) provided and. 3. Device according to claim 1 or 2, for use in a protective cover folding machine, characterized in that that an endless conveyor (23) is provided as the longitudinal feed device, which includes the embossing device extends to the book outlet, to which drivers (22) are attached according to the cycle intervals, which are on both sides of the longitudinal center near the spine of the book are located. 4. Apparatus according to claim 2, characterized in that the silicone rubber cushions are cylindrical structures whose axes run parallel to the folds. 509821/0365 Lee. r side