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Cartridge Clamping With Breakage Prevention

IP.com Disclosure Number: IPCOM000046148D
Original Publication Date: 1983-Jun-01
Included in the Prior Art Database: 2005-Feb-07
Document File: 3 page(s) / 43K

Publishing Venue

IBM

Related People

Crowe, WR: AUTHOR [+2]

Abstract

Fig. 1 is a cross-sectional view taken through the center of a printer ribbon cartridge 1 having resilient blades 3 biased to hold the ribbon spools 5 and 7 upward. To load cartridge 1 for use, it is lowered onto printer structure 9. Arms 11, each having a camming projection 13, enter mating openings 15 (Fig. 3) in floor 17 of cartridge 1. Each camming projection 13 has a straight camming surface 19 (Fig. 2), and the floor 17 extends on the side opposite arms 11 to an area at which the end of each surface 19 in the latching position is over floor 17 as well as the more easily broken blades 3.

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Cartridge Clamping With Breakage Prevention

Fig. 1 is a cross-sectional view taken through the center of a printer ribbon cartridge 1 having resilient blades 3 biased to hold the ribbon spools 5 and 7 upward. To load cartridge 1 for use, it is lowered onto printer structure 9. Arms 11, each having a camming projection 13, enter mating openings 15 (Fig. 3) in floor 17 of cartridge 1. Each camming projection 13 has a straight camming surface 19 (Fig. 2), and the floor 17 extends on the side opposite arms 11 to an area at which the end of each surface 19 in the latching position is over floor 17 as well as the more easily broken blades 3.

Blades 3 normally are somewhat fragile and, should an operator attempt to remove a cartridge 1 without first moving arms 11 to the unlocked position, blades 3, acting alone, would be broken. Such breakage is avoided by surfaces 19 engaging the structurally strong areas of cartridge floor 17.

As shown in Fig. 1, the cartridge has guide ridges 21 which mesh with tabs 23 on printer structure 9 to hold cartridge 1 when mounted against rotation, as is generally well known in cartridge printers. Arms 11 are integral with a washer- like pivot section 25 which is integral with a flat extension 27 (Fig. 2) to a handle
29. Section 25 is held in position on the bottom by flange 31, held on the printer. A central, ribbon-rotating assembly 32 bears on flange 31 and is powered by belt
34.

With cartridge 1 mounted and handle 29 moved counterclockwise (Fig 2.) to the clamping position, ribbon spools 5 and 7 drop downward under the influence of gravity and are ready to be fed by the printer feed mechanisms including ribbon-rotating assembly 32. Spool 5 is the supply reel, which is initially large and which is free to be unwound by a pulling action from the ribbon feed mec...