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TIJ PRINTHEAD PROFILE

IP.com Disclosure Number: IPCOM000026921D
Original Publication Date: 1994-Jun-30
Included in the Prior Art Database: 2004-Apr-07

Publishing Venue

Xerox Disclosure Journal

Abstract

When printing on plain paper using a thermal inkjet printer, one experiences a problem known as cockle. Paper cockle occurs when paper becomes wet with ink, deforms, and raises up. With a universal printhead mounted approximately 30 to 40 mils above the paper surface, the raised bump interferes with the printhead on the next imaging pass causing smear defects. As the printhead to paper surface spacing is reduced to less than 20 mils for quality printing, the problem becomes worse. The problem is even greater in color printing due to the usage of larger volumes of ink. Coated paper has been observed to deform, but without the image defects.