Patent GB-837132-A (GB)
Title: Improvements in or relating to the production of magazines, pamphlets and the like
IPC: B26D7/02
Filed: 1957-08-23
Abstract: 837,132. Book trimming apparatus. CORDEY, R. F. Nov. 24, 1958 [Aug. 23, 1957], No. 26629/57. Class 31 (1). [Also in Group XXX] Apparatus for trimming books of the kind comprising printed and folded sheets whose component pairs of leaves are secured together by wire stitching, comprises an endless conveyer 10, Fig. 1, upon which the books 11 are deposited in echelon by a printing machine, travelling means 19 whereby the echeloned stream is progressively gripped, in such manner as to expel air from between the leaves of the books, after mechanical alignment of their corresponding edges in a direction lengthwise of the conveyer, a cutter or cutters 43 for continuously trimming the aligned and/or opposite edges of the books acted on by the gripper means 19, a second endless conveyer 110 running at such speed that the books are deposited thereon with the same degree of mutual overlap as before the trimming operation, further travelling means 119 for progressively gripping the diverted stream of books after mechanical alignment of their uncut edges in a direction lengthwise of the conveyer, and a further cutter or cutters 143, 243 for continuously trimming the newly aligned and/or opposite edges of the books. As shown, the books are deposited on the conveyer 10 with their back edges 12 longitudinal to the latter for co-operation with aligning means 18, the fore edges 13 being trimmed at the first operation and the heads and tails after diversion of the stream. Alternatively, the books may be deposited on the conveyer 10 with their back edges foremost and transverse to the latter, the heads and tails of the books being trimmed at the first operation and the fore edges after diversion of the stream. The gripping means 19, or 119, comprise three endless bands running at the same speed as the associated conveyer, the spacing of the bands from the conveyer being adjustable by means of a screw, 38. The operative runs of the bands 19 progressively decrease in length in a direction away from the back edges of the books. Each conveyer 10, or 110, is formed in two sections the first being of constant width and the second comprising three bands 20, or 120, each of which co-operates with a gripping band 19, or 119, the bands of each set being maintained at substantially equal distances apart by means of a lead screw 56, or 59, with two threaded sections 57, 58, Fig. 3, of different pitch acting upon carriers 34, 36 for the bands. Endless belts 46, or 146, maintain pressure on the books during the trimming operations. Each conveyer 10, or 110, comprises transversely disposed slats 15, Fig. 2, carried by endless chains 16 which circulate in laterally-canted parallel planes, the slats each being upturned at 18, or 118, to provide a continuous aligning for books disposed on the conveyer. Each cutter comprises an axially adjustable disc, or a laterally adjustable endless band, the side of the cutter remote from the books having a shroud serving to direct cooling fluid to its operative edge while the cuttings pass to a suction intake below. The apparatus may also include a counter for automatically displacing one of the issuing stream of trimmed books after a predetermined number of the latter have passed a scanning point and thereby to facilitate packaging the books. According to the Provisional Specification, the first conveyer is provided at opposite sides thereof with two book-aligning plates which are continuously oscillated transversely of the conveyer by electromagnetic means, the books in this case reaching the conveyer with their stitched folds leading. Further, each trimming cutter may be supplemented by one or more other cutters arranged in the same plane.