Browse Prior Art Database

Drum Gap Seal

IP.com Disclosure Number: IPCOM000084790D
Original Publication Date: 1976-Jan-01
Included in the Prior Art Database: 2005-Mar-02
Document File: 2 page(s) / 39K

Publishing Venue

IBM

Related People

Bolan, PS: AUTHOR [+6]

Abstract

An effective, stable, and precise gap seal can be made for a photoconductor drum by preshrinking a MYLAR* sheet, machining it to provide grooves, and thereafter folding the sheet along the grooves and heating to permanently set the folds.

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Drum Gap Seal

An effective, stable, and precise gap seal can be made for a photoconductor drum by preshrinking a MYLAR* sheet, machining it to provide grooves, and thereafter folding the sheet along the grooves and heating to permanently set the folds.

Referring to the Fig. 1, a seal sheath 1 is folded along edges 2 and 3 to fit into slots of 4 of a machined core 5. The supporting core 5 is movable vertically to allow photoconductor material 6 on the drum surface to be moved into and out of the drum interior, and thereafter seal the opening.

In forming the sheath 1, the MYLAR sheet is first heated to approximately 300 Degrees F for one hour to preshrink the material and relieve residual manufacturing stresses. The sheet is then machined as shown in Fig. 2 to provide a thinner outboard portion 7 and folding groove 8. The sheath 1 is folded along the grooves 8 and placed in a setting fixture which is heated again to approximately 300 Degrees F for an hour to permanently shape the folds. Thereafter, the sheath 1 is slipped onto its core 5 and held in place by the two folded portions. * Trademark of E. I. du Pont de Nemours Company

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