Patent GB-810676-A (GB)
Title: Device for shaping web material
Inventor: WHEELER HENRY HARRISON
IPC: A24C1/04
Filed: 1956-06-15
Abstract: 810,676. Cigar-making machines. INTERNATIONAL CIGAR MACHINERY CO. June 15, 1956, No. 18535/56. Class 130. [Also in Group XVI] A vertically reciprocable suction table 28, Figs. 1 and 3, to which whilst at its lowest position a horizontally reciprocable suction head 26 on its leftward stroke delivers the leading end of a tobacco sheet material web W, is partially raised during the rightward stroke of the head 26 to bring knife 36, Figs. 3 and 9, on the table into coaction with rollers 162, 164 moving with the head and cut a binder (or wrapper) from the end of the web W held on the table 28. Knives 32, 34, horizontally pivoted about fixed posts 240, 248 so as to be moved aside by the head 26 on its leftward stroke, are spring-urged to the position shown where they trim the web leading edge by coaction with ledger plates 234, 236 on the table 28 during its further upward movement to deliver the binder to means T transferring it to a rolling apron. An auxiliary section table 27, Fig. 9, retains each new leading end of the web W until taken up by the head 26. Suction control cycle.-When the suction table 28 is raised, a chamber 130, Fig. 1, connected to a suction duct 132 communicates with the operative chamber 186 of the table via a port 194 opened by a table member 196. Ducts 29, 122, Fig. 3, connecting the chamber 130 with the operative chambers of the members 26, 27 are controlled by valves 126, 124 actuated by a rod 136 to transmit suction alternately to chambers 26, 27. Machine details.-The head 26 is trunnioned by arms 114 on a non-rotary shaft 116, a spring- loaded plunger 152 coacting with recesses of one arm 114 to hold the head 26 in operative position as shown or in a raised inoperative position. The rollers 162, 164 are trunnioned by arms 158, 160 on the shaft 116 which has been fixed thereon arms 170, 174 between which and the arms 158, 160 are both compression spring means 172, 176 operatively loading the roller 162, 164 downwardly and stop means 168, 180 limiting downward roller movement. The shaft 116 is supported at one end by a roller 148 traversing a guide 148 and at the other end is held in the member 118 reciprocated on a guide 84 by a linkage 86, 88. The table 28 is reciprocated vertically by a sliding rod 198 which in the raised position of the table is locked by a pivoting arm 220 spring loaded at 226 to engage beneath a rod collar 224, the member 118 engaging a rod 228 on the arm 220 to release the rod 198 at appropriate times. All the members 88, 136, 198 are actuated from one cam shaft (Fig. 2, not shown). Auxiliary web-feeding means. Intergeared feed rollers 20, 22 are intermittently driven in one direction via a one-way clutch and a chain 78 from the member 118. The web W passes to the rollers 20, 22 from a spool R, provided with a brake band 247 weighted at 249, under an idler 64 which falls on web slackening to close a linked switch 72 connected to a warning system or the machine electric drive control. The roller 20 is mounted in vertically sliding blocks 54 held by springs 55 against stop pegs 58, eccentric parts of the roller spindle passing through the blocks so that movement of a spring-loaded lever 60 fast with one of such parts allows separation of the rollers 20, 22 for initial web threading. In a modified machine the knives 32, 34, 36 are omitted, a stationary knife 302, Fig. 10, being provided which as it severs a web leading end trims the leading edge of a succeeding web leading end, whilst rollers 312, 314 coacting on their rightward strokes with the knife 302 are positively raised to an inoperative position during their leftward strokes by rotation of screwed spindles 316, 318 replacing the stop means 168, 180 and actuated by gears 322, 324 on their ends meshing a gear 328 mounting a finger 340 reciprocated by stops 342, 344. Specification 460,712 is referred to.