The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 29, 1988
Filed:
May. 13, 1987
Fusao Iwagami, Nara, JP;
Minoru Sakama, Nara, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
An ink jet printer nozzle clog preventive apparatus includes a cap member provided opposite a printing head on a carriage positioned outside the printing zone, the cap member being movable toward and away from the printing head, a moving mechanism including a driving source for moving the cap member toward the printing head, a pump connected to the cap member interior to achieve a negative pressure in the cap member when the printing head is covered with the cap member, a maintenance solution tank from which to supply maintenance solution to the cap member interior, a control system for controlling the moving mechanism, pump and maintenance solution tank according to the printer state, and an instruction switch for instructing a nozzle recovery operation when air enters the printing head nozzle.