Browse Prior Art Database

Straight Release Wire for Ribbon Cartridge

IP.com Disclosure Number: IPCOM000049192D
Original Publication Date: 1982-May-01
Included in the Prior Art Database: 2005-Feb-09
Document File: 3 page(s) / 71K

Publishing Venue

IBM

Related People

Abell, WA: AUTHOR [+4]

Abstract

This invention is embodied in a cartridge from which the typewriter ribbon 1 or the equivalent exits from a supply spool 3 by riding over a depending leg 5 of a wire 7. Ribbon 1 exits the cartridge through an exit opening formed in rhe side wall of the cartridge at the area of the wire leg 5. Ribbon 1 re-enters the cartridge in the opening of the cartridge walls opposite the exit location.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 53% of the total text.

Page 1 of 3

Straight Release Wire for Ribbon Cartridge

This invention is embodied in a cartridge from which the typewriter ribbon 1 or the equivalent exits from a supply spool 3 by riding over a depending leg 5 of a wire 7. Ribbon 1 exits the cartridge through an exit opening formed in rhe side wall of the cartridge at the area of the wire leg 5. Ribbon 1 re-enters the cartridge in the opening of the cartridge walls opposite the exit location.

Ribbon 1 is directed to a take-up spool 25, which is wound on take up hub
27. In a manner now well known, a drive sprocket from the typewriter enters the bottom wall 28 of the cartridge through an arcuate slot 29 and contacts the periphery of take-up spool 25 to wind the ribbon.

Wire 7 extends to a mounding post 33 (Fig. 2. shown illustratively in Fig. 1), integral with the top wall 34 of the cartridge. Wire 7 extends over supply spool 3, but in friction contact with groove 35 of the extension of the supply spool hub 37. Wire 7 is deformed to a predetermined position approximately at right angles to form depending leg 5 upon which ribbon 1 rides as it exits the cartridge. A hooked end 39 of leg 5 prevents ribbon 1 from slipping downward from leg 5.

Fig. 2 illustrates the mounting of the wire 7 in the cartridge by showing the position of wire 7 when neither spools or hubs are in the cartridge. Post 33 has grooves 41 on three sides, in which a corresponding, generally rectangularly shaped part 43 (Fig. 1) of wire 7 is inserted. Grooves 41 on post 33 form a three- sided outline whose plane is parallel to a line between the centers of the supply hub 37 and the take-up hub 27.

Wire 7 is bent at the junctions 47 of the rectangular part 43 and the straight section 51 which extends to hub 37. Thus, with reference to Fig. 1, wire 7 is bent counterclockwise. Depending on the inherent drag of the ribbon 1 being fed, the bending angle is typically 10 degrees or 18 degrees. This bend points section 51 of wire 7 to the relaxed position suggested in Fig. 2. The...