Patent GB-944942-A (GB)
Title: Improvements in or relating to shingles
Inventor: RIPPE DONDEVILLE MARTIN
IPC: B21D49/00
Filed: 1960-01-04
Abstract: 944,942. Making shingles; shearing; bending; dimpling. DONDEVILLE PRODUCTS CO. Inc. Jan. 4, 1960, No. 272/60. Headings B3A, B3E, B3Q and B3W. [Also in Division E1] A machine for making rectangular shingles having a hook or flange on each edge from aluminium &c. strip S comprises means for feeding the strip intermittently, means on each side of the feed-path for bending over side portions of the strip to form the flanges for two opposite edges of a shingle, means ahead of the bending means for severing a forward part of the strip, means for bending the rear margin of the severed part to form a third flange on the shingle, means forward of the severing means for bending the forward margin of the severed part to form the fourth flange, and means for operating the bending and cutting means between feed steps of the strip. The finished shingle has a top flange 33, Fig. 2, extending upwardly at an acute angle to the body B of the shingle, a lower angled flange 29 extending downwardly, and oppositely extending side flanges 21, 23. The gap between flanges 29, 33 and body B is increased at the diagonally opposite ends 29a, 33a (Fig. 28, not shown), and depressions 9 are formed in flange 33 for gripping an adjacent shingle; a folded nailing tag 15 is also provided. The strip S, Fig. 2, is slotted at 7, 11, 13, perforated at 17 and formed with the depressions 9 by a tool 5 which, between pressing operations, also feeds the strip. The tool comprises a beam 51, Fig. 6, carrying the cutters and formed with recesses 81 co-operating with bolts to produce the depressions, and a slide 45 supporting the beam on guides 53. Rails 49 for the slide are carried by side plates 1, 3. Bell-crank levers 67 on pivots 61 on the slide carry rolls 69, 71 retained by bridge-plates 77 between vertical flanges 75 on the beam. Operation of levers 67 to lower the beam for the pressing and clamping operation and then for feeding the clamped strip is by links 111 connected to gears 107 driven by gears 103, 105 from a continuously rotating shaft 97, which is driven through a reduction gear by an electric motor. At the end of a feed-stop upper and lower clamps 159, 169, Fig. 8, extending between stations 3 and 4 and operated by pneumatic cylinders 153, 163 controlled electrically by a cam on shaft 97, clamp the strip against supports 125, 127 which extend between stations 3 and 5. During the return stroke of tool 5, bending tools 135, 145 operated by pneumatic cylinders 129, 139 controlled electrically by a cam on shaft 97, form flanges 21, 23 between stations 3 and 4. The flanges 21, 23 on the strip section between stations 4 and 5 are folded over the body of the strip by bars 177, 178, Fig. 11, controlled by the cam-shaft 97. The strip section at station 5 is severed by a bending cutter 197, Fig. 13, on a beam 196 having a cam-follower 193 at each end which engages a cam-groove 195 in the outside face of one of the gears 103. Cam-grooves 221 in the inside faces of gears 103 operate levers 215 supporting a bending bar 217 which folds (Fig. 14, not shown), the flanged edge 199 formed by cutter 197 beneath a plate 209. A hold-down bar 223 biased by springs 229 acting against a plate 231 engages the strip. After the folding operation, a tapered edge section 210, Fig. 18, of plate 209 is withdrawn by a pneumatic cylinder 210a controlled by the camshaft. At station 6, Fig. 21, a pivoted bar 245 is swung, by a pivoted pneumatic cylinder 253, close to the unflanged strip-edge, which is then folded over the bar by a bar 263 rotated by a rack-and-pinion gear 269, 271, operated by a pneumatic cylinder 275 controlled by the cam-shaft. An enlargement 247a on the end of bar 245 forms the offset part 33a of the flange 33. A pneumatic cylinder 287, Fig. 19, controlled by the cam-shaft, operates a pusher 293, discharging the shingle through a slot in plate 1 to rubber ejector-rolls 295 driven as from an electric motor by a chain 299. A steel section of each roll 295 engages flanges 29, 33 respectively, and a weighted spring-pressed bar 337 restores offset part 29a to the desired position before being pivoted to an inoperative position by the shingle.