Tracing apparatus with suction paper control means

Details Tracing apparatus with suction paper control means Tracing apparatus with suction paper control means

1974-08-13

1976-03-09

Hartary, Joseph W.

Recorders

Record receivers and/or driving means therefor

Web

242182, G01D 1528

Patent

active

039435300

ABSTRACT:
The invention relates to a tracing apparatus operating automatically on the basis of digital imputs.
A buffer-loop is formed in the paper band between each drive roll and the control drum, and the loops so formed are balanced by a loop corrector/reader device. In one prior art apparatus, this device includes photoelectric cells.
The tracing apparatus is characterized in that it includes three suction chambers, one for each buffer-loop and a third central chamber beneath the control drum, whereby two saggings of the paper are obtained on either side of the control drum that are entirely independent of the two buffer-loops.

REFERENCES:
patent: 3202373 (1965-08-01), Reader
patent: 3254854 (1966-06-01), Deighton et al.
patent: 3305873 (1967-02-01), Mourier
patent: 3722929 (1973-03-01), Gilman
patent: 3723981 (1973-03-01), Stange

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