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Photoconductor Incrementing Drum

IP.com Disclosure Number: IPCOM000060126D
Original Publication Date: 1986-Mar-01
Included in the Prior Art Database: 2005-Mar-08
Document File: 2 page(s) / 79K

Publishing Venue

IBM

Related People

Horstman, JA: AUTHOR [+2]

Abstract

A drum covered by a photoconductor is used in the electrophotographic process of a copier or printer. In this design, the drum is encircled by a sheet of photoconductor starting from a supply roll within the drum and terminating at a take-up roll within the drum. The photoconductor on the surface of the drum can be replenished from the supply roll, and the used photoconductor wound onto the take-up roll. The photoconductor is manually advanced, tensioned, and sealed by a simple mechanism that can be used in a small drum and allows ample space for stored photoconductor. In the figures, the photoconductor 12 follows a path from supply roll 10, through the sealed slot 19 to the surface of the drum, around the drum, back through the sealed slot 19, and then to the take-up roll 13.

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Photoconductor Incrementing Drum

A drum covered by a photoconductor is used in the electrophotographic process of a copier or printer. In this design, the drum is encircled by a sheet of photoconductor starting from a supply roll within the drum and terminating at a take-up roll within the drum. The photoconductor on the surface of the drum can be replenished from the supply roll, and the used photoconductor wound onto the take-up roll. The photoconductor is manually advanced, tensioned, and sealed by a simple mechanism that can be used in a small drum and allows ample space for stored photoconductor. In the figures, the photoconductor 12 follows a path from supply roll 10, through the sealed slot 19 to the surface of the drum, around the drum, back through the sealed slot 19, and then to the take-up roll 13. The supply roll 10 is locked by ratchet 14 and pawl 15. The take- up roll is restricted to forward motion by a one-way clutch 16. Photoconductor tension is maintained by the take-up shaft 17 which is a torsion rod. The slot 19 through the drum shell 18 has a seal 26.

The seal 26 is held down by rods 20 which are connected to springs 21. The photoconductor on the drum surface is replenished as follows.

A tool is inserted into the end of shaft 22, and the shaft is manually rotated. Attached to the shaft 22 is the supply roll release cam 23 which drives link 24 against pawl 15 and releases the supply roll. Also attached to shaft 22 are seal- lift cams 27 which...