Patent GB-1214529-A (GB)
Title: Apparatus for folding strip material
IPC: B29C53/04
Filed: 1968-03-19
Abstract: 1,214,529. Folding fabrics. GOODYEAR TIRE & RUBBER CO. 19 March, 1968 [17 April, 1967], No. 13147/68. Heading D1S. A strip tyre cord fabric W is folded along a longitudinal fold line by continuously advancing the strip along a path including the fold line and turning successive increments of length of the material about the fold line while supporting the fabric on a pair of longitudinally moving elongate surfaces 16, 18. The leading end of a web of bias cut tyre cord fabric W is drawn from an interleaved roll 220, Fig. 9, over guides 222 to form a of travel of the fabric W by a photocell unit festoon 230 which is used to control the speed 240 and a reflector 242, the interleaving protective material C being rewound on a spool 226. The fabric W then passes through a centering guide means 232 positioned so that the required line of fold coincides with the central plane and fold line F, Fig. 1, of the apparatus 10 and under an adjustable rotatable guide and marking wheel 112 so as to be adhered lightly to the surfaces 16, 18 of belts 12, 14. The belts 12, 14 pass around crowned pulleys 20, 22 having a rotational axis normal to the plane F and pulleys 24, 26 having rotational axes 25, 27 parallel to the plane F and are driven by a motor 62. As the belts 12, 14 advance from the pulleys 20, 22 their surfaces 16, 18 and the fabric W thereon converge angularly and rotate about the fold line until the two parts of the fabric W are brought into face-to-face contact as the belts 12, 14 and the fabric W pass through the nip 68 between the pulleys 24, 26, the positions of which pulleys relative to the plane F are adjustable by jack screws 70, 72. The folded fabric FW passes over a delivery roll 250, Figs. 1 and 10, driven at a peripheral speed equal to the speed of the surfaces 16, 18 and is draped to form a festoon 258 to control the speed of a take-up roll 270 through a photocell unit 272 and a reflector 274. The fabric FW passes through a side guide or centering device 260, over a guide 262 and is wound onto the roll 270 together with an interleaving strip C. Idler rolls 74, 76, 78 guide the belts 12, 14. Adjustable edge guide wheels 94, 100 restrain the outer edges 12a, 14a of the belts 12, 14 from lateral movement. The inner edges of the belts 12, 14 are constrained by rotatable double-coned rollers 130, 132 cooperating with double-coned rollers (134), (136), respectively, Figs. 4 and 5 (both not shown), and doubleconed edge guide rollers 138, 140. Rollers (200), (202), Fig. 8 (not shown), form a small auxiliary nip immediately preceding the nip 68. The fabric may be fed through one or more subsequent apparatus to effect a subsequent fold or folds or a plurality of strips may be interfolded, Fig. 11. In a modification (not shown), flexible supporting members for the tyre cord fabric are longitudinaly fixed whilst guide means are moved to progressively turn the supporting surfaces about the fold line. In further modifications (not shown), the belts 12, 14 are replaced by a series of shorter belts on each side of the plane F or by a plurality of similar length but lesser width belts on each side of the plane F.