Uniform pressure distributing self-leveling pinch roll for magnetic card transport system
AssigneeXerox Corporation
InventorRobert H. Townsend
Life of this patent
Estimating the term…
Abstract
A magnetic card transport subsystem for an electronic typewriter comprises a reversible drive roll and a coacting pinch roll which form a nip through which a magnetic card is passed. The drive roll and pinch roll coact to move the card in opposite directions. The pinch roll is so mounted that it can rock and be self-leveling to permit the full width of the pinch roll to engage the card and uniformly distribute pressure thereto. A mechanism for adjusting the pinch roll for alignment purposes is also provided.
Claims9
A card transport system comprising a card support member having a top surface, an opening in said member extending through said top surface, a drive roll supported for rotation about an axis which is generally parallel to said top surface and having a portion thereof extending into said opening with a plane tangent to the periphery thereof being substantially coplanar with said top surface, means for driving said roll, a shaft extending in a direction generally normal to said top surface and having an annular flange at the lower end thereof, a pinch roll support member operatively connected to said shaft and comprising a U-shaped bracket forming a pair of spaced legs extending from a closed end, an opening in said closed end through which said shaft extends, a portion of the closed end of said bracket engaging a portion of said flange, said portions of said bracket and said flange being so constructed to form an axis about which said shaft and said bracket can relatively move, said axis being generally normal to said shaft, a pinch roll mounted on said legs for rotation about an axis generally normal to said rocking axis and generally parallel to said top surface, said pinch roll being located above said top surface opposite said drive roll and forming a card receiving nip with said drive roll, and resilient means urging said pinch roll towards said drive roll.
A card transport system comprising a card support member having a top surface, an opening in said member extending through said top surface, a drive roll supported for rotation about an axis which is generally parallel to said top surface and having a portion thereof extending into said opening with a plane tangent to the periphery thereof being substantially coplanar with said top surface, means for driving said roll, pinch roll support means connected to said card support member, a first vertical shaft rotatably connected to said pinch roll support means, a pinch roll mounted on the lower end of said first shaft for rotation about an axis transverse to said first shaft, a transversely extending arm operatively connected to said shaft for rotating the same, a second vertical shaft rotatably mounted on said pinch roll support means and laterally spaced from said first shaft, a portion of the lower end of said second shaft engaging a portion of said arm, said portions of said arm and said second shaft being so constructed and arranged to rotate said first shaft in opposite directions during rotation of said second shaft in one direction, said pinch roll being located above said top surface opposite said drive roll and forming a card receiving nip with said drive roll, and resilient means urging said pinch roll towards said drive roll.
Dependencies are inferred from the claim text.