Patent ES-290104-A1 (ES)
Title: Improvements in or relating to magazines for ribbon-like blades
IPC: B26B21/26
Filed: 1963-07-17
Abstract: In a magazine 17 for a ribbon blade 22 which passes from a supply coil 221 through a shaving zone 25 to take-up means 24, means are provided for imparting a frusto-conical form to the portion of the blade at each end of the zone 25, the apex of each such frusto-conical portion lying forwardly of the sharpened edge 22b of the blade. The form-imparting means are the resultant of (a) angularly inclined surfaces 34b, 34c provided on the side walls 19b, 19c of the cover 19 (b) cylindrical surfaces of small radius at the ends 25a, 25b of the shaving zone and (c) pads 28 adjacent each end of the shaving zone and having vertical front surfaces contacting the rear edge 22a of the blade to displace the blade edge 22b forwardly in the shaving zone. The surfaces 34b, 34c are inclined at an angle between 83 and 87 degrees to the plane of the bottom of the element 21 receiving the supply coil 221. The element 21 is provided with a plurality of inclined fingers 21b. The magazine is held by means of a spring-influenced pivotally-mounted latch 46 in a holder 16 having a head 40 connected by a web 41 to a handle 50. A lip 40a on the head is provided with slots 40b receiving hold-down elements 29 on the magazine. The blade is advanced by means of a crank-arm 44 provided on the holder, the crank-arm being in operative connection with the arbor of the take-up means. A ring 27 indicates the number of shaving blade lengths remaining in the supply coil 221. Debris accumulated during shaving is removed through slots 30a, 30b in a guard 30. In a modification, shoulders 172a, 172b, Fig. 16 (not shown), are provided on the inner surface of a cover 119 to limit outward bowing of a blade 122 in a magazine 117 when the latter is disassembled from a holder 116. The front wall 119a of the cover is bowed rearwardly when the magazine is disassembled and assumes a flattened form on assembly of the magazine. The front end of the rotatable arbor of take-up means 124, Fig. 25 (not shown), is provided with an eccentric 166 on which is rotatably mounted a ring 167 indicating the number of shaving lengths remaining in supply coil 1221. The ring 167 has gear teeth 167a, Fig. 19 (not shown), engaging the teeth 168 of a stationary ring on the inner face of the front wall 119a of the cover. The ring 167 is provided with a pin 169 located in a hole in the front face of the take-up arbor, the pin being sheared off when the arbor is initially rotated to tighten the blade. Debris is prevented from accumulating between the blade and take-up end 125b by means of a vertical face 171, Fig. 25, which is inclined to the zone portion 125 and extends outwardly and forwardly to the take-up end 125b thereby guiding debris to removal slots. Back plate 118, Fig. 20 (not shown), of the magazine is split from opening 123 to provide two flexible arms 160a, 160b having fingers 161a, 161b with inclined surfaces 161a1, 161b1 to engage complementary inclined surfaces 162a, 162b, Fig. 21 (not shown), in the lower wall 119d of the cover to form a dove-tail connection. The outer surface of the wall 119d is provided with lugs 163a, 163b, Fig. 20, and with a cam surface 164, Fig. 21, which is continued and provided on the lower end of plate 118 as a cam surface 1641, the lugs and cam surfaces co-operating with a snap-action latch 175 to aid in ejecting a used magazine from the holder.