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:
May. 17, 1988
Filed:
Apr. 06, 1987
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An ink jet recorder is provided with a recovery device for preventing unsatisfactory ink discharge of a recording head, the recovery device being provided with ink suction means having a cap covering an ink discharge port, a vent valve for opening and closing the interior of the cap with respect to the atmosphere and a suction pump for producing a negative pressure in the cap, and wiping means having a cleaning blade adapted to be advanced and retracted relative to the ink discharge port. The cleaning blade is protruded when a motor effecting the sequence operation of the ink suction means revolves in one direction, and is stopped at its retracted position when the motor revolves in the opposite drection. A method of operating such ink jet recorder is characterized by operating the recovery device in one cycle sequence comprising the steps of bringing the cap into intimate contact with the ink discharge port, closing the vent valve, operating the suction pump, opening the vent valve, restoring the suction pump to its initial state, operating the suction pump, restoring the suction pump to its initial state, closing the vent valve, spacing the cap apart from the surface of the ink discharge port, opening the vent valve, and restoring the suction pump to its initial state.