Ink supply system with tube pump
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United States of America Patent
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-
Nov 24, 1987
Issued Date -
N/A
app pub date -
Sep 10, 1986
filing date -
Jun 13, 1983
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An ink supply system for writing instruments which operate with liquid ink. The writing instrument has a large-volume ink reservoir which communicates via a recharge valve with a small-volume ink reservoir which is adjacent to the writing element. The transmission of ink from the large-volume ink reservoir to the secondary reservoir is controlled by a sensor as a function of the quantity of ink which is present in the secondary ink reservoir. In order to simplify the recharging of the ink, and to be able to operate with the least possible electrical energy, the present invention utilizes as a recharge valve a tube pump which is rotatably driven by an electric motor and also can generate the pressure necessary to convey the ink to the secondary ink reservoir.
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