Browse Prior Art Database

CLEANING APPARATUS FOR A MAGNETOGRAPHIC RECORDING HEAD

IP.com Disclosure Number: IPCOM000025330D
Original Publication Date: 1984-Oct-31
Included in the Prior Art Database: 2004-Apr-04
Document File: 4 page(s) / 203K

Publishing Venue

Xerox Disclosure Journal

Abstract

Magnetographic copiers or printers of the type having a stationary recording head to receive video or digitized data signals and to imprint the signals as latent images on a moving magnetic tape as it passes in contact therewith may take a variety of structural configurations. Generally, such copier/printers have process stations downstream of the recording head which develop the latent magnetic image, transfer the developed image and clean or remove the residual development material such as magnetic toner. Subsequent to these processing stations the tape passes by an erase station to remove the latent image thereon so that the tape may receive a new latent magnetic image from the recording head. If the tape is in an endless belt configuration, multiple copies of the original latent image may be obtained by simply not energizing the erase station and by not energizing the recording head. Once the desired number of copies are made, the erase station is activated and the recording head may proceed to produce another latent magnetic image. As is well known in the prior art, the cleaning stations do not remove all of the toner particles and there may be some other tape contaminating particles, such as dust and paper particles, which settle or are attracted to the tape imaging surface. Accordingly, the surface of the recording head collects these particles from the tape as it slidingly moves by the stationary recording head. When enough contaminating particles have accumulated on the recording head, the recording by the head is degraded.

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XEROX DISCLOSURE JOURNAL

CLEANING APPARATUS FOR A MAGNETOGRAPHIC RECORDING HEAD Herman A. Hermanson

Proposed Classification
U.S. C1. 340/174 Int. CI. H04q
Almon P. Fisher

30

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FIG. 2

Volume 9 Number 5 September/October 1984 305

[This page contains 1 picture or other non-text object]

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CLEANING APPARATUS FOR A MAGNETOGRAPHIC RECORDING HEAD (Cont'd)

Magnetographic copiers or printers of the type having a stationary recording head to receive video or digitized data signals and to imprint the signals as latent images on a moving magnetic tape as it passes in contact therewith may take a variety of structural configurations. Generally, such copier/printers have process stations downstream of the recording head which develop the latent magnetic image, transfer the developed image and clean or remove the residual development material such as magnetic toner. Subsequent to these processing stations the tape passes by an erase station to remove the latent image thereon so that the tape may receive a new latent magnetic image from the recording head. If the tape is in an endless belt configuration, multiple copies of the original latent image may be obtained by simply not energizing the erase station and by not energizing the recording head. Once the desired number of copies are made, the erase station is activated and the recording head may proceed to produce another latent magnetic image. As is well known in the prior art, the cleaning stations do not remove all of the toner particles and there may be some other tape contaminating particles, such as dust and paper particles, which settle or are attracted to the tape imaging surface. Accordingly, the surface of the recording head collects these particles from the tape as it slidingly moves by the stationary recording head. When enough contaminating particles have accumulated on the recording head, the recording by the head is degraded.

A cleaning device for cleaning the recording head in a maqnetogtaphic printing device is shown in the accompanying figures. Though useful for cleaning the smooth surface of a typical magnetic recording head, this invention is particularly useful in periodically cleaning a thermal printing head having a plurality of heating elements that form a ridge across the surface of the printing head. The ridge in the printing head prevents the prior art cleaning devices from removing the toner particles that have accumulated on the sides of the ridge.

The cleaning apparatus 10 for a recording head 11 shown in Figures 1 through 3 comprises a flexible cleaning member 12 constructed of a plastic material in a woven configuration having spaces therein, such as, for example, a piece of ordinary plastic screen. Such a material has been found not to damage the magnetic imaging surface of the magnetic tape.

The embodiment of the cleaning member 14 shown in Figure 4 is a two layered composite sheet having a plastic screen lay...