Patent GB-1112728-A (GB)
Title: Safety razor with ribbon-type blade
IPC: B26B21/26
Filed: 1966-09-30
Abstract: 1,112,728. Razors. EVERSHARP Inc. 30 Sept., 1966 [22 Oct., 1965], No. 43745/66. Heading B4B. A magazine 12 for a ribbon-type razor blade 20 having a cutting edge 30 and a blunt edge 31 comprises a body 16 having a flat bridge section 34 providing a supporting surface 35 across which the blade passes from a supply reel 17 to a take-up reel 18, both of which provide resistance to tension the blade, the bridge section having a rear guide surface and being relieved at opposite ends forming raised lands 54, 57, Fig. 10, to provide a path of increased distance for the blade adjacent the cutting edge to tighten the blade and simultaneously urge it laterally against the surface 36. The blade is provided with a plurality of uniformly-spaced apertures 32 which are engageable with a number of inclined lugs 47 which are non- symmetrically arranged on the bridge section. The blade is clamped on the bridge section by means of a spring 21 provided with an inclined portion 142 terminating in a scalloped edge 136 interfitting with the lugs 47 and provided with openings 138, 139 engaging over inclined lugs 45, 46 on the bridge section. The magazine body 16 has a base 33 provided with a barrel 38 having an opening 40 for rotatably mounting the supply reel 17 and provided with an opening 42 for rotatably mounting the take-up reel 18. The magazine cover 22 has a boss 81, the rear surface of which is provided with ratchet teeth (83), Fig. 12 (not shown). The take-up reel includes a drum (101) provided with a cross-slot (103) in which is disposed a raised lug (104) for co-operation with a clip (105) which grips the leading end of the blade. A radial flange (107) formed on the drum (101) is provided with pawls (112, 113) which engage the ratchet teeth (83) to limit rotation of the take-up reel to one direction only. The take-up reel is rotated in the opposite direction, to wind up a used portion of the blade, by means of a lever 23 formed integrally with a split ring (118), Fig. 16 (not shown), provided with an inner circumferential surface (120) which is interrupted by an inclined pawl (121) disposed adjacent the split (122) so that the ring (118) may enlarge as the pawl (121) moves up ratchet teeth (115) provided on an axially-extending boss (114) on the drum (101), Fig. 17 (not shown). The supply reel includes a drum (130), Fig. 9 (not shown), having a cross-slot (131) formed with an enlarged end for co-operation with a clip (132) on the trailing end of the blade. An integral radial flange at the rear portion of the drum (130) provides a guide for the blunt edge of the blade and on the opposite side is provided with arcuate lugs (134, 135, 136), Fig. 13 (not shown), which are a snug fit in the bearing opening (40) to keep the blade under tension as it is unwound. The bridge section has a guard 37 provided with slots to permit the passage of shaving waste. The magazine is held in the frame 13 of a holder 11 by means of a spring- urged pivoted lever 15. The holder has a handle 14 provided with arms (166, 167), Fig. 2 (not shown), disposed between runners (95, 96) provided at the lower edge of the magazine cover to preclude lateral movement of the cover, the runners also serving to limit rotation of the lever (23) in both directions. The frame 13 has a flange 27 including a terminal lip 28 for engaging the exposed portion of the blade. The lever 23 is joined to the take-up reel by means of a button 24.