GB200072A - Improvement in paper folding machines - Google Patents

Abstract

200,072. Independent Paper Mills, Inc., (Assignees of Arelt, C.). June 27, 1922, [Convention date]. Delivery apparatus.-A paper web is drawn by feed rollers from a supply roll through a device which provides it with a plurality of longitudinal folds, after which it may be cut and folded transversely for the production of paper napkins &c. The longitudinal folder, arranged between the supply roll 43, Fig. 1, and the feed rollers 37, 38, Fig. 4, comprises two members 21, 22. The member 21 consists of a central part a, Fig. 10, and side parts b at an angle thereto. The other member 22 consists of a central triangular part d, Fig. 9, and side parts f, spaced from the part d to provide slots 23 and pivoted at 26 so that they may be swung away from the part d to facilitate the insertion of the web at the beginning of the folding operation. A guide roller 24 is mounted at the free end of the member 21, and rollers 25 for completing the folds, are journaled at the converging ends of the parts d, f. This construction of the folding members causes the web to receive three longitudinal folds as shown in Fig. 14. By providing two additional angled surfaces b<1> on the member 21, as shown in Fig. 17, and two additional spaced parts f<2> on the member 22, the web may be provided with five longitudinal folds. For producing paper napkins, the folded web is cut transversely into sections, which are then folded transversely into the folding rollers 74, Fig. 4, by means of a blade 70 carried by an arm 67 oscillated by a cam 72. Cutting-apparatus.-The transverse cutting of the folded web 42 is effected by a cutting blade 57 carried by a roller 58, Fig. 4, coacting with grooves 56 in the drum 46. Gripper mechanism.-The front end g of the web section h being cut, and the end of the web immediately behind the cutter 57, are held against the drum 46 by grippers such as 48, Fig. 8. These grippers are mounted on pins at the edges of the drum, the pins carrying pinions 55 engaged by racks 54 on spring plungers 50 fitted with runners adapted to engage stationary earns 53 on the machine framing 20, whereby the grippers are moved to their open position. A rubber &c. strip 58<a> mav be provided on the roller 58 to press resiliently on the grippers 48 so as to hold the web more securely during the cut.