Patent GB-1505183-A (GB)
Title: Apparatus for cutting and dispensing wound material from a roll
IPC: B65H16/06
Filed: 1975-04-04
Abstract: 1505183 Web dispensers M GRANGER and A LEROND 4 April 1975 [5 April 1974 4 Dec 1974] 14000/75 Addition to 1430153 Heading B8M A support 5 which carries a drum 18 and cooperating blades 25, 26, and a roll carrier B which carries a roll R are mounted within a casing A by means of "integral" portions 5c, 5d and 6 of the support 5 and the carrier B respectively engaging in corresponding "integral" portions 1b, 2a and 3a respectively on the casing A. The blade 25 is mounted directly on the drum 18 and the roll R is biased by spring 11 secured to the carrier B to frictionally engage the drum 18. The apparatus so formed includes a cam 28 mounted on the drum shaft, a shock absorber 29 connected to a compression spring 31 and a pawl 30 whereby upon pulling of the material the drum 18 is rotated and the material is cut into a strip by the blade 25 co-operating with the stationary blade 26 to be dispensed. The cam 28 continues to rotate whereby a further portion of the material is advanced towards the cutting location, and then abuts a stop 29a of the shock absorber 29 thereby pushing it in the direction of the arrow (see Fig. 4). This compresses the spring 31 and brakes the drum movement. The return movement of the spring 31 brings the absorber 29 to its original position whereby the cam 28 is pushed in the direction opposite to its initial movement and stopped by the pawl 30 which prevents the drum 18 from rotating in the reverse direction. The cam 28 is tilted when the material is pulled whereby it escapes from the shock absorber 29 to repeat the operation. The cam 34 can be locked between an abutment 29a of the abosrber 29 and an abutment 35a of the pawl 35 and a member 36 is moved to disengage the cam to repeat the cutting operation. The cam is made of polyurethane material and the drum can be made of plastics or wood. The blades 25, 26 are of the bar type. The blades may be made of spring steel, Fig. 12 (not shown), wherein the first blade (52) is glued or otherwise secured to the drum (54) in a notch (54a) and the second blade (53) is connected to the support (55), advantageously via twisted and inclined portion (55a). The second blade (53) may be glued or otherwise attached to a sup. porting bar (56), Fig. 13 (not shown) which is floatably connected to the support (55) by means of screws (57), (59) provided with an elastomeric washer (58) and a resilient member such as a helical spring (60) respectively. The bar (56) may be omitted. In a further modification, Fig. 8 (not shown) a lever (38) cooperates with a projection (39) on the drum 18 to present a sheet of material to be pulled and an anti-return ratchet (40) co-operates with a pinion (20) to prevent the drum from rotating to rewind the material. The drum in another embodiment, Figs. 9-11 (not shown) has a raised portion 49 forming an eocentricity or is mounted with an eccentricity (x) in a direction substantially away from the point of attachment of a first blade (51) to promote progressive pulling movement on the material. In another embodiment (Fig. 14) a pedal 61 is pressed to move a rack 66 which drives a pinion 67 to revolve a drum 68. The hood 4 is of plastics material. The drum is connected to the support 5 through a spring 24 which promotes the rotation of the drum when the web material is pulled. The wound material may be toilet paper, paper towelling and material for use in packing.