Patent GB-462994-A (GB)
Title: Improvements in or relating to book-binders' wrappering or covering machines
IPC: B42C11/04
Filed: 1935-10-19
Abstract: 462,994. Bookbinding. LONGMANS, GREEN, & CO., Ltd., PEARTON, H. W., and MILLS, H. Oct. 19, 1935, No. 28909. Addition to 419,315. [Class 16] The bookbinding-machine described in the parent Specification is modified in that it includes means for subjecting the fillers to one or more nipping operations during their passage to the filler-traversing means, means for pressing the upwardly folded cover sheets on to the end sheets of the fillers, and means for applying rubbing-down pressure to the backs of the covered books. The filler-supporting rack and the suction device shown in the parent Specification are displaced to the free end of the channel plate 33 and raised, and a further channel plate is provided between the suction device and the filler-traversing means. Each filler is fed from the rack to the new channel plate by the suction device, then moved along the channel by a reciprocating finger to a position where the back of the filler is nipped between a fixed bar and transversely reciprocating bar. The filler in this position rests on a plate which is moved from beneath the filler after the nipping- operation to allow the latter to fall on to the channel plate 33, and is then conveyed therealong to the clamping and traversing means as described in the parent Specification. The rollers for applying adhesive to the end sheets of the filler are modified in that a pair of longitudinally-grooved rollers are adapted to apply the adhesive as a series of narrow closelyspaced stripes, these rollers being geared to further rollers which transfer adhesive from the adhesive containers to the grooved rollers. Each grooved roller is removably mounted, and provided with a longitudinal recess. Means comprising a worm and a worm-wheel are provided whereby the grooved rollers can be rotated independently of the rackdrive to set the recesses to suit the width of the filler to be coated with adhesive. The divided table between the two plates of which the filler and cover are fed downwardlv is modified in that the two spring-urged ledges thereof are replaced by a single sliding plate positively controlled by a cam-drive so that it is retracted from beneath the back of the filler prior to separation of the table halves. Each half of the divided table is provided with racks engaged by toothed segments mounted on a traverse shaft adapted to be oscillated through a resilient drive including a toothed segment engaged by a similar toothed segment on a lever controlled by a cam. The pressure rollers situated beneath the divided table, and adapted to continue the downward feed of the filler and cover and to press the cover on to the filler as described in the parent Specification, are replaced by vertically disposed pressure plates h, h<1>, Fig. 5, the plate h<1> being stationary, and the plate h being movable by means of a cam h<3>, lever and link mechanism h<5>, h<6>, lever arm h', and rack-and-pinion means h<8>. A hand crank h<9>, actuating through gearing h<10>, and screw-threaded spindles h<11> engaging screw-threaded holes on the plate h<1>, is adapted on rotation to adjust the plate h<1> relative to the reciprocating plate h. The covered filler is dropped between the plates to rest on a horizontal plate m slidably mounted on the plate h. As soon as the pressure plates h, h<1> have clamped the covered filler, the supporting plate m is'retracted by cam and lever means to uncover the back of the book cover, whereupon the back can be subjected to a rubbing action. The " rubbing-down " device comprises a carriage n adapted to be reciprocated on a track, and rollers n<1> urged upwardly by spring means are mounted on the carriage to engage the back of the covered filler. The carriage n is attached to a continuous driving chain n' driven from a sprocketwheel n<3> which is connected through a slipping friction clutch to a pinion n4 engaging a reciprocating toothed rack n<5> driven from a cam n<9>. After the carriage has returned from beneath the covered filler, the pressure plate h is moved away from the plate h<1> to allow the filler to drop into a discharge shoot o. The pressure plates are recessed, and may be provided with polished stainless steel faces.