Recorders – Writers – Receiver and marker movable
Patent
1979-01-09
1980-10-21
Hartary, Joseph W.
Recorders
Writers
Receiver and marker movable
242185, 242 7552, 346136, G01D 938, G01D 1528
Patent
active
RE0304220
ABSTRACT:
4. An instrument for graphically recording information by providing a visually perceptable image on a web of flexible, wide sheet material comprising:
a pair of spools with flexible wide sheet material extending therebetween,
a head for graphically transferring information onto said flexible material,
means for displacing said head in two different transverse directions across at least a portion of the width of said flexible material during transferring of information,
a driving means located opposite said head for contacting said flexible material between said spools and for moving said flexible material in two different longitudinal directions past said head during transferring of information, said directions being perpendicular to the displacement of said head,
said driving means including a control spindle of low rotational inertia and having a minimum diameter compatible with the flexibility of said flexible material,
and air pressure means to hold said flexible material against a portion of the surface of said control spindle and applied between said control spindle and each of said pair of spools forming loops therebetween and isolating said control spindle from the inertial action of said spools, whereby said control spindle and said air pressure means cooperate to positively control movement of said flexible material past said head without the use of any other drive means for said flexible material.
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Benson-France
Hartary Joseph W.
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