Browse Prior Art Database

Molded Ribbon Cartridge With Brake

IP.com Disclosure Number: IPCOM000046078D
Original Publication Date: 1983-May-01
Included in the Prior Art Database: 2005-Feb-07
Document File: 2 page(s) / 46K

Publishing Venue

IBM

Related People

Craft, JA: AUTHOR

Abstract

The drawings show a cartridge for a roll of typewriter or other printer ribbon molded in two parts from any flexible resilient plastic. Cover 1 has a depending, resilient brake-spring arm 3. Cartridge body 5 has a generally immobile brake post 7 on its outer wall and a resilient tension-spring arm 9 at the ribbon exit area near the post 7. In operation, the ribbon moves arm 9 and arm 9 encounters lower ledge 11 of brake arm 3 to release the brake.

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Molded Ribbon Cartridge With Brake

The drawings show a cartridge for a roll of typewriter or other printer ribbon molded in two parts from any flexible resilient plastic. Cover 1 has a depending, resilient brake-spring arm 3. Cartridge body 5 has a generally immobile brake post 7 on its outer wall and a resilient tension-spring arm 9 at the ribbon exit area near the post 7. In operation, the ribbon moves arm 9 and arm 9 encounters lower ledge 11 of brake arm 3 to release the brake.

Ribbon 13 in a spool is mounted for rotation on post 15, a central post which is also molded into cartridge body 5. Cover 1 is attached to the top of body 5 with ribbon 13 exiting between arm 9 and post 7 (Fig. 2). The ends of arm 3 and post 7 are positioned to tightly nip together, and ribbon 13 is positioned within that nip to thereby brake ribbon 13 until the nip pressure is released.

Ribbon 13 is also directed around the end of spring arm 9. Ribbon feed mechanisms of the printer thereby apply a force which pivots arm 9 toward ledge
11. When arm 9 encounters ledge 11, arm 3 is pivoted away from post 7 and the braking force is released. Engagement with ledge 11 is shown in phantom lines in Fig. 2.

Arm 9 functions in a conventional manner to take up slack in the ribbon, as well as functioning to control the brake. As all of the elements described except the ribbon are molded in one of two parts, the brake is provided at moderate cost and a similar brake on the printer can be eliminate...