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US 4,629,177 AGranted
Pressure roller arrangement for a paper transport device
AssigneeU.S. Philips Corporation
InventorsGerardus J. H. Roddeman, Paul Hoogerkamp
Life of this patent
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Abstract
A device for transporting a flexible strip (11) along a guide (15) by means of conical pressure rollers (35 and 45), whose apices face each other. The pressure rollers (35 and 45) are loaded by a spring (65, 135) common to both rollers, as a result of which an accurately defined directional force is obtained towards the guide (15).
Claims9
A device for transporting a flexible strip in a transport direction along a guide, comprising:
- at least two conical pressure rollers, each being rotatable about its respective conical axis and being arranged with said axis transverse to said transport direction, the apices of the roller facing each other;
- at least at a respective area of pressure contact with the strips, each conical roller being made of an elastically deformable material, and
- means for urging said rollers against a strip being transported, said means being arranged such that the force exerted by one pressure roller on the strip differs from the force exerted by the other pressure roller,
- characterized in that said means comprises a single spring and at least one coupling member, said single spring applying different forces respectively on said pressure rollers via said at least one coupling member.
1 more element
A device for transporting a flexible strip in a transport direction along a guide, comprising:
- at least two conical pressure rollers, each being rotatable about its respective conical axis and being arranged with said axis transverse to said transport direction, the apices of the rollers facing each other;
- at least at a respective area of pressure contact with the strips, each conical roller being made of an elastically deformable material, and
- means for urging said rollers against a strip being transported, said means being arranged such that the force exerted by one pressure roller on the strip differs from the force exerted by the other pressure roller,
- characterized in that said means comprises a single spring, and
- a movable bridge coupled to both pressure rollers, said single spring being coupled asymmetrically to said bridge so as to apply different forces respectively on said pressure rollers.
2 more elements
Dependencies are inferred from the claim text.