Chart recorder

Details Chart recorder Chart recorder

1991-07-22

1993-11-23

Fuller, Benjamin R.

Recorders

Performance of multiple functions of steam and gas engines

Pressure responsive element

128710, 271265, 346 33ME, 346134, 346136, 400582, 400583, 400708, B41J 1142, B41J 2944, A61B 50432, B65H 702

Patent

active

052648648

ABSTRACT:
A chart recorder (10) is disclosed having an automatic paper loading system, an automatic tensioning system and an "odometer" system for determining the amount of paper moved through the chart recorder. The chart recorder (10) includes a print roller (34) and a feed roller (22), both in frictional contact with the paper in the recorder and both connected to and rotated by a motor. The feed roller (22) is connected to the motor through a one way clutch that allows the feed roller (22) to "free wheel" when the feed roller (22) is rotated at a faster rate, due to frictional contact with the paper, than the roller would be rotated by the motor (56). Dissipative forces in the one way clutch (68) and bearings (24) of the feed roller (22) cause it to resist being rotated which imparts tension to the paper and draws it into contact with a paper guide (14). The chart recorder (10) also has a system for positioning the paper at the top of form position before printing begins and an "odometer" system for determining the amount of paper moved through the chart recorder. The "odometer" system includes a timer for measuring the length of time the paper is moved through the chart recorder and a control system, preferably including a microprocessor, which multiplies the length of time the paper has moved through the chart recorder by the rate that the paper is moved through the chart recorder to determine the length of paper moved through the chart recorder.

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