Browse Prior Art Database

Hard Copy and Forms Printer

IP.com Disclosure Number: IPCOM000092660D
Original Publication Date: 1967-Feb-01
Included in the Prior Art Database: 2005-Mar-05
Document File: 3 page(s) / 40K

Publishing Venue

IBM

Related People

Hider, TM: AUTHOR

Abstract

In high-speed nonimpact printing, it is desirable to have a system which not only prints the information but also prints the form corresponding to that information, i. e., a bill of lading. This system performs both of these functions and, in general, is a hard copy and forms printer. Electrostatic latent images of information are formed on a dielectric coated paper. After the images are developed and fixed, the printed information on the sheet is scanned by a photocell. The output of the latter causes the registration of the printed information and a form printing gravure roll. Thus the form is properly printed in conjunction with the printed information.

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Hard Copy and Forms Printer

In high-speed nonimpact printing, it is desirable to have a system which not only prints the information but also prints the form corresponding to that information, i. e., a bill of lading. This system performs both of these functions and, in general, is a hard copy and forms printer. Electrostatic latent images of information are formed on a dielectric coated paper. After the images are developed and fixed, the printed information on the sheet is scanned by a photocell. The output of the latter causes the registration of the printed information and a form printing gravure roll. Thus the form is properly printed in conjunction with the printed information.

Dielectric coated paper from supply roll 1 is fed past paper cutter 2 which cuts the paper into the desired length. Variable alphanumeric information from a cathode ray tube CRT 3 exposes photoconductor belt 4 having corona discharge charging unit 5 and erase unit 6 positioned adjacent the path of belt 4. Prior to exposure by CRT 3, belt 4 is uniformly, electrostatically charged by unit 5. Upon exposure, belt 4 is discharged in the area of exposure such that a wrong reading electrostatic charge pattern is formed with the charges remaining in the background of the pattern. The electrostatic charge pattern thus formed is brought into contact with sheet 1a of the dielectric coated paper. The electrostatic charge pattern is transferred to the paper with the voltage applied such that the electrostatic charge pattern is reversed and the charges now are in the pattern rather than the background.

The electrostatic charge pattern is then moved past developing station 7, such as a magnetic brush, and fusing station 8, thus rendering visible the electrostatic charge pattern. The sheet then is diverted by selector unit 9 and is cycled back past photocell 10. The latter controls clutched feed rolls 11 which, in turn, are...