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Browse Prior Art Database

MOLDED STATIC ELIMINATOR BRUSHES

IP.com Disclosure Number: IPCOM000025913D
Original Publication Date: 1988-Dec-31
Included in the Prior Art Database: 2004-Apr-04
Document File: 2 page(s) / 52K

Publishing Venue

Xerox Disclosure Journal

Abstract

Static eliminator brushes are manufactured by an injection molding technique wherein electrically conductive plastic is applied directly over evenly spaced fiber bundles. A two-piece mold is provided through which a plurality of bundles of fibers are stretched. The mold is closed and molten conductive polymer is injected at ports between each of the fiber bundles in a direction parallel to the direction of the fibers so as not to destroy or disturb the fibers. The flow of polymer is stopped and the molded brush is allowed to cool after which is opened. the mold, indexed forward from the mold. Thereafter the mold closes and once again the polymer flows. The molded brush is lifted from the mold and moved forward to a holdingjtrim fixture thus permitting the mold to recycle for the next part. Excess fibers are trimmed from the molded brush during mold close and removed from the moldltrim fixture to permit the next cycle. This provides a one-step inexpensive technique that can be fully automated.

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KEROX DISCLOSURE JOURNAL

MOLDED STATIC ELIMINATOR Proposed Classification

BRUSHES U.S. C1.361/221 Leonard R. Gaige
Joseph A. Swift
Donald Natale

I

Int. C1. H05f 3/00

Static eliminator brushes are manufactured by an injection molding technique wherein electrically conductive plastic is applied directly over evenly spaced fiber bundles. A two-piece mold is provided through which a plurality of bundles of fibers are stretched. The mold is closed and molten conductive polymer is injected at ports between each of the fiber bundles in a direction parallel to the direction of the fibers so as not to destroy or disturb the fibers. The flow of polymer is stopped and the molded brush is allowed to cool after which is opened. the mold, indexed forward from the mold. Thereafter the mold closes and once again the polymer flows. The molded brush is lifted from the mold and moved forward to a holdingjtrim fixture thus permitting the mold to recycle for the next part. Excess fibers are trimmed from the molded brush during mold close and removed from the moldltrim fixture to permit the next cycle. This provides a one-step inexpensive technique that can be fully automated.

Volume 13 Number 6 November/December 1988 33 1

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332 XEROX DISCLOSURE JOURNAL

Volume 13 Number 6 Novernber/December 1988

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