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Shock Resistant Ribbon Cartridge

IP.com Disclosure Number: IPCOM000041134D
Original Publication Date: 1987-Sep-01
Included in the Prior Art Database: 2005-Feb-02
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Edds, KE: AUTHOR [+5]

Abstract

Loops on the outer circumference of a ribbon within a cartridge are prevented from dropping into the space between the cartridge side wall and the outer circumference of the ribbon due to either slack tension or rough handling prior to installing the cartridge on a typewriter. The cartridge 1 has the outer clearance because it is designed to accommodate manufacturing tolerances. The bottom wall portion 2 of cartridge 1 is molded concave upwardly into the cartridge to provide a clamping action until cartridge 1 is installed.

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Shock Resistant Ribbon Cartridge

Loops on the outer circumference of a ribbon within a cartridge are prevented from dropping into the space between the cartridge side wall and the outer circumference of the ribbon due to either slack tension or rough handling prior to installing the cartridge on a typewriter. The cartridge 1 has the outer clearance because it is designed to accommodate manufacturing tolerances. The bottom wall portion 2 of cartridge 1 is molded concave upwardly into the cartridge to provide a clamping action until cartridge 1 is installed.

Cartridge 1 (Fig. 1) has portion 2 of its bottom wall disposed upwardly from a portion 3 of the bottom wall, which is integral with a side wall 4 of the cartridge 1 as shown in Fig. 2. The bottom wall portion 2 includes a central hub 5 (Fig. 1) which receives a core (not shown) of a ribbon spool having a ribbon wound therearound. The core of the ribbon spool has teeth on its bottom engaged by a pair of diametrically disposed teeth 6 on portions 7 (Fig. 3) extending upwardly from the bottom wall portion 2. The engagement of the teeth of the core with the teeth 6 prevents any rotation of the ribbon spool during handling. It should be understood that the cartridge 1 has a top cover (not shown) fitting over the side wall 4, so as to substantially enclose the ribbon spool.

The bottom wall portion 2 (Fig. 4) has upstanding tabs 8 at the ends of three support arms 9 of the bottom wall portion 2. The tabs 8 prevent the...