Patent GB-824512-A (GB)
Title: Improvements in and relating to a pleating machine
IPC: D06J1/06
Filed: 1957-10-03
Abstract: 824,512. Pleating machines. EZBELENT, G. Oct. 3, 1957 [April 25, 1957], No. 30973/57. Class 141 Tapered or sunray pleats are formed by a pleating machine of the type wherein the material is gathered by a reciprocating gripping device P into the nip between two pressing rolls 12, 13, the machine being modified so that the upper roll can pivot horizontally about a fixed point on its axis and can move vertically away from the roll 13. The lower roll 13 may be similarly mounted for horizontal pivoting or it may be fixed. Movement of rolls. The rolls 12, 13 are carried by hollow, preferably heated, shafts 47, 48 respectively, connected at one end to fixed supports, while the other end of at least the shaft 47 is mounted in a support 4 which is slidable relative to the frame 2. Movement of the support 4 causes the roll 12 to pivot about the bearing at its fixed end. The amplitude of the sliding movement is controlled by screws 5 engaging in apertures 6 and by an adjustable stop screw 7. This sliding movement is controlled by a cam C<SP>4</SP> co-operating with a roller 76 on a spring-pressed arm 77 pivoted at 78 and provided at its end with a slot 80 engaging a pin 81 on the support 4. Vertical movement of the upper roll 12 and the associated felt band 59 and counterweight roller 60 is controlled by twin cams C<SP>5</SP> co-operating through rollers 82 with levers 83-85; the lower ends of the levers 85 bear against the journals 85a of the counterweight roller, while their upper ends carry rollers 87 contacting bearing surfaces 88 on the shaft 47. Gripping device. The gripping device P includes two parallel plates 16 fixed on journals 14 which are slidable in apertures 15. The reciprocating movement of the gripping device is effected by cams C<SP>1</SP> each having a recess in which is engaged a roller 27 connected by a lever 28 to the journal 14; the amplitude of this movement is adjustable by a lever 31 pivoted to the frame at 32 and engaged by a journal 29 which is slidable on the lever 28. The jaws of the gripping device are opened by the peripheries C<SP>2</SP> of the cams C1 co-operating through rollers 36 and levers 37 with a member 39 which pushes the member 21 upwardly against the action of a spring 22. Pivoting of the gripping device about the journal 14 is controlled by a cam plate C<SP>3</SP> which rotates intermittently about the shaft 23 under the effect of links and a ratchet and pawl device 40a-f; the cam plate carries retractable studs 41 each of which in turn encounters a finger 42a on a lever 42 connected through the triangular sector 44, roller 45 and levers 46 with the plates 16 of the gripping device. Formation of pleats. The cams C<SP>1</SP>, C<SP>3</SP>, C<SP>4</SP>, C<SP>5</SP> may be synchronized in different ways for the formation of pleats. In the embodiment wherein both rolls 12, 13 can pivot (Figs. 4-11, not shown), while the gripping device is moving forward and tilting the rolls are separated, then pivoted, brought together again, and pivoted back to the normal position; the rolls are then rotated by means of linkage 61-67 and a ratchet and pawl 69, 68, thus forming a tapered pleat. Two alternative systems of forming a pleat when only the upper roll pivots are described (Figs. 18-24, 30-36 respectively, not shown). In all cases, the roll is arranged to pivot in one direction while the rolls are in contact and in the other direction while they are separated. By adjustment of the stop screw 7 to an extreme position the support 4 can be fixed, and the machine used to form straight pleats.