Browse Prior Art Database

Lever and Retaining Assembly for Ribbon Cartridges

IP.com Disclosure Number: IPCOM000043453D
Original Publication Date: 1984-Sep-01
Included in the Prior Art Database: 2005-Feb-04
Document File: 2 page(s) / 51K

Publishing Venue

IBM

Related People

Jenkins, WM: AUTHOR

Abstract

Impact printers commonly require screws or clips for retaining ribbon cartridges. This simplified lever and retaining assembly needs neither screws nor clips. Fig. 1 shows a detailed view of lever 1 with four locking tabs 2, cartridge holding tenon 3, a back-stop arm 4, a compression spring 5, and a cam surface 11. Fig. 2 shows a detailed view of the lever socket which is molded into the ribbon plate and consists of slide ledges 6, a back stop 7, a spring-retaining surface 8, a forward stop 9, and a cam surface 12. Fig. 3 shows lever 1 with spring 5 inserted in the lever and poised over the socket (Fig. 4) ready for assembly. In Fig. 5, lever 1 rests on top of slide ledges 6 of the socket. Spring 5 abuts the spring-retaining surface 8. Note that the back-stop arm 4 is above the back-stop 7.

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Lever and Retaining Assembly for Ribbon Cartridges

Impact printers commonly require screws or clips for retaining ribbon cartridges. This simplified lever and retaining assembly needs neither screws nor clips. Fig. 1 shows a detailed view of lever 1 with four locking tabs 2, cartridge holding tenon 3, a back-stop arm 4, a compression spring 5, and a cam surface 11. Fig. 2 shows a detailed view of the lever socket which is molded into the ribbon plate and consists of slide ledges 6, a back stop 7, a spring-retaining surface 8, a forward stop 9, and a cam surface 12. Fig. 3 shows lever 1 with spring 5 inserted in the lever and poised over the socket (Fig. 4) ready for assembly. In Fig. 5, lever 1 rests on top of slide ledges 6 of the socket. Spring 5 abuts the spring- retaining surface 8. Note that the back-stop arm 4 is above the back-stop 7. Tabs 2 of the lever clear the slide ledges 6 of the socket when lever 1 is pushed to the right in Fig. 6. This allows the lever to drop down onto the slide ledges to surface 10 of lever 1. Back-stop arm 4 is now aligned with back-stop 7. In Fig. 7, as pressure is relaxed, the compression spring 5 pushes lever 1 to the left so that the lock tabs 2 capture the slide ledges 6 in tongue and groove fashion. Cam surface 11 on lever 12 of the socket have flexed the back-stop arm 4 past the back-stop 7. Fig. 8 shows the finally assembled position. Lever 1 is held against forward stop 9 by spring 5. The positioning cartridge (not show...