Composite nip roll and nip ring
First Claim
Patent Images
1. A web-fed rotary printing press, comprising:
- a cylinder forming a nip roll or a nip ring, the cylinder having a rigid shaft;
a polymer inner material around the shaft;
an outer covering around the polymer inner material; and
at least one limiting ring between the shaft and the outer covering, wherein the at least one limiting ring limits further deflection of the polymer inner material and the outer covering when the polymer inner material and the outer covering are deflected by a predetermined amount.
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Abstract
A composite nip roll or nip ring that is durable and requires minimal adjustment, and which accurately provides a constant gain. In accordance with an exemplary embodiment, the nip roll or ring has a rigid shaft, a resilient polymer inner material mounted on the rigid shaft, and a metal outer covering over the resilient polymer inner material. The metal covering can be rigid or flexible. The nip roll can also include limiting rings that limit deflection of the outer covering to a maximum amount.
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Citations
25 Claims
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1. A web-fed rotary printing press, comprising:
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a cylinder forming a nip roll or a nip ring, the cylinder having a rigid shaft;
a polymer inner material around the shaft;
an outer covering around the polymer inner material; and
at least one limiting ring between the shaft and the outer covering, wherein the at least one limiting ring limits further deflection of the polymer inner material and the outer covering when the polymer inner material and the outer covering are deflected by a predetermined amount. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A web-fed rotary printing press, comprising:
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a first cylinder forming a nip roll or a nip ring, the first cylinder having a rigid shaft;
a polymer inner material around the shaft;
a rigid outer covering around the polymer inner material; and
at least one limiting ring between the rigid shaft and the rigid outer covering;
wherein when a force is applied to the first cylinder by a ribbon or a second cylinder, the entire rigid outer covering is displaced with respect to a rotational axis of the first cylinder, and wherein the at least one limiting ring limits further deflection of the polymer inner material and the outer covering when the polymer inner material and the outer covering are deflected by a predetermined amount.
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19. A web-fed rotary printing press, comprising:
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a first cylinder; and
a second cylinder;
whereinthe first and second cylinders form a nip, and at least one of the first and second cylinders comprises a rigid shaft, a polymer inner material around the shaft, an outer covering around the polymer inner material, and at least one limiting ring between the rigid shaft and the outer covering;
wherein the at least one limiting ring limits further deflection of the polymer inner material and the outer covering when the polymer inner material and the outer covering are deflected by a predetermined amount. - View Dependent Claims (20, 21, 22)
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23. A web-fed rotary printing press, comprising:
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a cylinder forming a nip roll or a nip ring, the cylinder having a rigid shaft;
a resilient inner material around the shaft;
an outer covering around the resilient inner material; and
at least one limiting ring between the shaft and the outer covering;
wherein the outer covering has a greater tensile strength than the resilient inner material, and wherein the at least one limiting ring limits further deflection of the resilient inner material and the outer covering when the resilient inner material and the outer covering are deflected by a predetermined amount. - View Dependent Claims (24, 25)
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Specification