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US 4,540,994 AGranted
Releasable pen block guide
AssigneeSanders Associates, Inc.
InventorJames Lawrence
Life of this patent
Estimating the term…
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AssigneeSanders Associates, Inc.
InventorJames Lawrence
Estimating the term…
A releasable pen block guide for releasably holding the pen block carriage of an X-Y plotter against the track during horizontal traverse movement. A first pair of wheel sets disposed in 90.degree. relationship are rigidly attached to one side of the pen block so as to guide the pen block carriage along the track when held in contact with one of the edges of the track. A pair of second, double, bogey-mounted wheel sets similarly aligned are carried by the pen block carriage and adapted for movement between a first position in contact with the other of the edges of the track and a second position out of contact with the other of the edges of the track and spaced from the first wheel sets sufficiently to allow the pen block carriage to be removed from the track. The second wheel sets are mounted to respective ends of a leaf spring extending outwardly from the pen block carriage in opposite directions along the edge of the track and parallel thereto, wherein the second wheel sets are bogey-mounted to the outward ends of the leaf spring for pivotal movement between the first and second positions.
In a graphics plotter having a track disposed parallel and transverse to a moving web of writing medium and a pen block carriage mounted for movement along the track on sets of wheels bearing on parallel front and rear surfaces of the track, the improvement comprising:
In a graphics plotter having a track and a pen block carriage mounted for movement along the track on sets of wheels bearing on parallel front and rear surfaces of the track, the improvement comprising:
Dependencies are inferred from the claim text.