Dismiss
InnovationQ will be updated on Sunday, Oct. 22, from 10am ET - noon. You may experience brief service interruptions during that time.
Browse Prior Art Database

Chemically Generated Images Using an Impact Printer

IP.com Disclosure Number: IPCOM000074782D
Original Publication Date: 1971-Jun-01
Included in the Prior Art Database: 2005-Feb-23
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Parker, AA: AUTHOR [+2]

Abstract

Low-cost terminal printer using developer-containing porous type elements are impacted against a suitable precoated sheet to chemically generate human and machine readable characters.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 100% of the total text.

Page 1 of 1

Chemically Generated Images Using an Impact Printer

Low-cost terminal printer using developer-containing porous type elements are impacted against a suitable precoated sheet to chemically generate human and machine readable characters.

Porous type elements, preferably mounted on a chain or train, carry a nominal supply of nonaqueous developer solution (e.g., an iron salt like F(e)Cl(3).6H(2)O). When the elements are impacted against a paper web treated with a colorless phenol (e.g., propyl gallate), the developer transfers to the paper according to the pattern of the type face. The iron salt in the developer reacts with the phenol on the paper to produce on the paper surface a dry, permanent, smearless intense black precipitate in the shape of the character. The solvent carrying the iron salt is absorbed into the paper at the time of the reaction. The developer supply is periodically replenished; e.g., by being fed to the type elements from a reservoir during each revolution of the chain or train.

Thus, no dyes or pigments exist in the developer or coating, yet the printed image is formed from a pigment with little transfer pressure. Conventional inks and ribbons are eliminated.

1