GB1029582A - Improvements relating to rotary cutting and creasing presses - Google Patents

Abstract

1,029,582. Creasing apparatus. ENGLISH SEWING COTTON CO. Ltd. July 10, 1964 [April 12, 1963], No. 9650/63. Heading B6J. [Also in Divisions B4 and B5] In a cylinder machine for producing creased and cut-out blanks for boxes &c., a tympan or complementary member to the cutting and creasing forme is made by attaching to the cylinder a steel sheet with a covering of force board or presspahn, taking an impression of the form on to the board by carbons, removing the sheet from the cylinder and attaching it to a similar cylinder 19, Figs. 4, 6, associated with devices for cutting grooves in the board where the creasing marks occur. The second cylinder comprises a number of rods 16 attached to end discs 17 and similar intermediate discs, the discs 17 having bearings mounted on frames 21. The cylinder 19 can be rotated by means of a hand wheel and can be locked in any circumferential position by means operated by a handle 22, Fig. 3. Brackets 25 attached to the frames 21 support a member 26 carrying adjustably a plate 27 with a chamfered straight edge 29 arranged to be parallel to the cylinder axis. A guide rail 31 is fixed to the plate 27. As shown, a portable rotary toothed cutter 33 with a flexible drive 34 is used for cutting the grooves, but a non-rotary cutter may be employed. For making a longitudinal groove, the cylinder 19 is rotated until the line of the groove is adjacent to the edge 29 and is then locked. The cutter is then placed on the plate 27 with a groove 35, Fig. 4, in its casing 36 engaging the rail 31 and the cutter 33 positioned just beyond the straight edge 29. The depth of cut is determined by a screw-adjusted member 38 abutting against the plate 27. For cutting the circumferential grooves, a plate 40, Fig. 6, curved to the cylinder periphery is provided, the plate having a circumferential rib 46 for engagement with the groove 35 of the cutter casing 36. A strip 42 attached to the plate 40 has a screw 43 which is engaged with the rail 31 and adjusted so that one edge of the plate 40 abuts against the edge 29. The parts 42, 40, 36 can be moved in the axial direction along the plate 27 until the cutter 33 is in position to cut a circumferential groove, whereupon the cylinder 19 is rotated to produce the groove. After the grooving has been completed, the surplus board around the edges corresponding to the shape of the blank is removed. The completed tympan is now ready for mounting on the cylinder of the cutting and creasing machine. The cutting and creasing forme may be mounted on a chase having threaded holes aligned with threaded holes in the machine bed for receiving securing screws, so that if the chase is detached from the bed it can be re-attached easily in correct alignment. Thus, during preparation of a tympan, its forme may also be removed from the machine, and another forme and tympan inserted so that the machine need not be idle during preparation of a tympan.