Patent GB-767196-A (GB)
Title: Improvements in or relating to machines for cutting up sheets of material into strips
Inventor: COXHEAD ARTHUR
IPC: B23D19/06
Filed: 1953-03-19
Abstract: 767,196. Cutting - machines. SENIOR PRESS, Ltd. May 20, 1954 [March 19, 1953], No. 7660/53. Class 31 (1). [Also in Group XVI] In a machine for cutting printed and other sheets 2 of paper, cardboard or other material longitudinally into strips, the leading edge of each sheet to be cut is adapted to be seized by means of grippers 1 and the sheet drawn through shearing means by translatory movement of a reciprocatory table 4 on which the grippers are mounted, and the shearing means include longitudinal shear strips 5, Fig. 4, mounted on the table 4 and each transversely adjustable so that its inclination to the direction of reciprocation of the table can be varied to follow various lines non-perpendicular to the leading edge of the sheet. Each sheet to be cut is laid on a fixed table 39 and the shear strips 5, which are transversely adjustable by means of nuts and bolts 5a, Fig. 4, passing through slots 5b in the table 4, co-operate with spring-influenced bevelled cutter wheels 6. At the end of the forward travel of the'table 4, the grippers 1 are released and grippers 10 are applied to force the strips of the sheet against a rubber strip 11, Fig. 4. When the table returns to its initial position, the strips of the sheet are left behind, held at one end by the grippers 10, and as the table clears the other ends of the strips of the sheet, the grippers 10 are released and the strips drop into troughs 12 arranged underneath the table. The strip 11 is provided at intervals with projections to incline the cut strips and the side walls of the troughs 12 are each formed like the sides of an isosceles triangle so that as each strip drops it strikes the apex of a trough and slides edgewise thereinto. When the strips of the sheet are picked up from the table, the waste strips at each side of the sheet travel back with the table and are removed by blades 15 when the table again moves forwardly. The table 4 is reciprocated by means of arms 19, 20, 21, Fig. 1, connected to a pair of inertia wheels 18 driven by an electric motor 16. One of the wheels 18 carries a cam shape which strikes a roller 22 mounted on a spring-loaded arm 23 carried by a shaft 24 to rotate the latter and, through linkage, rotate a shaft 24d to release two leading edge stops 25, Fig. 4, and through the linkage and gear wheels 24e, 24f rotate a shaft 24g to release a side edge stop 25a. The shaft 24d also operates, through linkage, the waste strip removing blades 15. The grippers 1 are carried by a shaft 26, Fig. 5, on the table 4 and are applied by means of a cam follower 29 cooperating with a pivotally-mounted inclined slide 30. The grippers 1 are released at the end of the forward travel of the table 4 by means of a roller 26a carried by the shaft 26 striking a cam member 26c mounted on the machine frame. The grippers 10 are applied by means of a cam-piece 34 (not shown) on the table rotating a cam 35 and are released by a further cam-piece 37 on the table tripping a lever 38a, Fig. 4, holding a rod 38 which re-sets the cam 35. The sheet is aligned against the stops 25, 25a, by means of guides 40, Fig. 5, on the shaft 24g and is held while being cut by means of guides 41 on a shaft 42.