Graphic recorder

Details Graphic recorder Graphic recorder

1982-08-20

1984-10-16

Hartary, Joseph W.

Recorders

Record receivers and/or driving means therefor

Web

226118, 242184, G01D 1528

Patent

active

044778228

ABSTRACT:
A graphic recorder of the vacuum column buffer type has a pair of wells into which the two loops on the sheet material are drawn down. Top and bottom sensors are provided in each well for maintaining the loops within a predetermined range of movement; but in addition, the supply and take-up rolls are slaved to the speed of the drum. Cross-coupling is provided between the two wells to tend to equalize the vacuums therein.

REFERENCES:
patent: 3305873 (1967-02-01), Mourier
patent: 3504369 (1970-03-01), Kashkin
patent: 3713606 (1973-01-01), Van Pelt
patent: 3857525 (1974-12-01), Gerber
patent: 3943530 (1976-03-01), Mourier
patent: 4158846 (1979-06-01), Gordon
Roberts, S. D.; Linear Reel Motor Servomechanism; IBM TDB, vol. 13, No. 10, Mar. 1971, pp. 3155-3156.

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