Patent GB-318735-A (GB)
Title: Improvements in severing mechanism for cutting off tickets or receipts from a strip
IPC: B41K3/68
Filed: 1928-08-21
Abstract: 318,735. Simms, W. H., (Ohmer Fare Register Co.). Aug. 21, 1928. Tickets, issuing and cutting off. -Comprises severing mechanism for ticket-issuing machines of the kind including a cam and means operatively connecting said cam and the knife to cause the latter to be positively reciprocated, wherein a lever connected to the movable knife is operated by a second lever which is actuated by the cam to move the knife, the said cam subsequently engaging the lever connected to the knife to actuate it in the opposite direction. The paper strip is fed after printing between rollers 21, 22 and through the knife mechanism. A locking plate 23 is bifurcated at the upper end to receive the shaft 18, provided with a slot 24 which receives a cross-bar 25 mounted on standards 26 secured to a cross-bar 27, the standards being cut away to receive the rotatable shaft 8 which holds them against turning. The lower end of the plate 23 is provided with a rear projection 29 engaging the shaft 8 and serving as a stop for the locking plate which also has a downwardly and forwardly projecting arm 30. Arms 31 mounted on the cross-bar 27 carry a rod 32. The arms 31 are provided with lugs 33 which may be engaged by levers 34 mounted on the cross-bar 27. Arms 35 also connect the cross-bar 27 and the rod 32. The stationary knife 36 is fitted with plates 37, 38 having extensions 39 forming guides for the paper which is fed through an aperture 40 in the knife. A projection 41 on the plate 23 locks the knife 36 in position. To insert the knife mechanism, the levers 34 are lifted clear of the projections 33, and the rod 32 swung outward, the locking plate being then manually raised. The lower end of the plate 37 and knife 36 are oppositely curved to embrace the bar 27, the plate 37 being resilient. The knife construction is then pressed rearwardly to engage the lug 41 with the knife. The rod 32 is swung back clamping the lug 41 to the knife and the levers 34 moved back locking the arms 31, 35. U-springs 42 are secured to the stationary knife 36 which press the movable knife 44 towards the stationary knife. The latter is provided with a guide 46 at one end only and a horizontal bar 47 to .guide the movable knife 46 which is provided with a channel 45. The upper edge of the knife 44 is not parallel to the guide 47. As the knife moves upwards the shearing action travels along the guide 47 and the plates of the movable and fixed knives do not coincide until the shearing action is completed when the knife edges of fixed and movable knives are in the same plane. The lower portion of the movable knife is provided with a hook 48 which receives a knob 49 of one arm of a bell-crank 50 pivoted on a pin 51 secured to a plate 52 mounted on the shaft 8 and cross-bar 27. A bell.crank lever 55 is pivoted to the crossbar 27 one arm of which has a cam 56 engaged by the cam surface 54, the other arm having a cam 57 which engages the lower bevelled edge 58 of the lug 53. The shaft 8 is rotated from the crank handle of the machine and the knife is first lowered, then raised and then slightly lowered. Specification 276,436 is referred to.