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PLASTIC SHAFT SPRING

IP.com Disclosure Number: IPCOM000026503D
Original Publication Date: 1992-Jun-30
Included in the Prior Art Database: 2004-Apr-06
Document File: 4 page(s) / 128K

Publishing Venue

Xerox Disclosure Journal

Abstract

A shaft spring for a roller assembly is formed as a one-piece moulding 10 from plastics material. A front view of the moulding is shown in Fig. 1 and a side view is shown in Fig. 2. The moulding comprises upper and lower portions 1,2 interconnected by two curved flexible members 3. The upper portion 1 of the moulding has a groove 4 in its upper surface and the lower portion 2 has a groove 5 in each side and is shaped at 6 so that it will sit directly on the bearing of the shaft of a roller assembly, as described below.

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Page 1 of 4

XEROX DISCLOSURE JOURNAL

PLASTIC SHAFT SPRING

D. White

Proposed Classification
U.S. C1.355/317 Int. C1. G03g 21/00

6 FIG. I

\

10

10 FIG. 2

1

FIG. 3

XEROX DISCLOSURE JOURNAL - Vol. 17, No. 3 May/June 1992 163

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Page 2 of 4

PLASTIC SHAFT SPRING(Cont'd)

11

FIG. 4

FIG. 5

FIG. 6

13

FIG. 7

FIG. 8

164 XEROX DISCLOSURE JOURNAL - Vol. 17, No. 3 May/June 1992

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Page 3 of 4

PLASTIC SHAFT SPRING(Cont'd)

A shaft spring for a roller assembly is formed as a one-piece moulding 10 from plastics material. A front view of the moulding is shown in Fig. 1 and a side view is shown in Fig. 2. The moulding comprises upper and lower portions 1,2 interconnected by two curved flexible members 3. The upper portion 1 of the moulding has a groove 4 in its upper surface and the lower portion 2 has a groove 5 in each side and is shaped at 6 so that it will sit directly on the bearing of the shaft of a roller assembly, as described below.

The spring 10 is used to apply a force to the shaft of one of a pair of roller assemblies and thereby produce a nip force at the rolls. The manner in which the spring is used is illustrated in Fig. 3. The shafts of the roller assemblies are positioned in side plates, one of the shafts being movable in slots in the side plates and the position of the other shaft in the side plates being fixed. One of the side plates 8 is partly shown in Fig.3 together with the spring 10 which is located in a T-shaped slot 9 in the side plate and seated on the bearing 7 of the movable shaft. The spring 10 is located in the slot 9 by: inserting the lower portion 2 of the spring into the upper, horizontal portion 9A of the slot; pushing the portion 2 down in the slot using the grooves 5 unti...