Browse Prior Art Database

Forms Flash

IP.com Disclosure Number: IPCOM000045018D
Original Publication Date: 1983-Jan-01
Included in the Prior Art Database: 2005-Feb-06
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Bowden, LD: AUTHOR [+2]

Abstract

A xerographic laser printer includes a forms overlay sheet which lies in the path of the scanning laser beam, but is transparent to the laser beam energy.

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Forms Flash

A xerographic laser printer includes a forms overlay sheet which lies in the path of the scanning laser beam, but is transparent to the laser beam energy.

The forms overlay (which may be a business form to be filled in with laser- generated variable data) is in the nature of a negative. That is, it is opaque where the printed document is to be white (i.e., without toner), and it is transparent where the printed document is to be a black line on the finished document.

This xerographic printer is of the reversal-development type, where discharged portions of the photoconductor will retain black toner, as the photoconductor passes through a developing station.

A light source of a critically selected spectral characteristic, flash-illuminates the photoconductor through the forms overlay. Light from this source passes through only the transparent portions of the forms overlay, and thereby leaves a discharged latent image of the form on the photoconductor.

An on-off scanning laser beam is of a different spectral characteristic, and its energy passes through both the opaque and the transparent portions of the forms overlay, just as if it were not physically in the way of the laser beam. The laser thereby writes variable data on the form by selectively discharging the photoconductor. The form is thereby "filled in".

Since both latent images (the forms overlay latent image, and the laser data latent image) are generated on the photoconductor at the same physic...