Roll assembly for fiber drafting machine
US4837908A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 28, 1988 |
| Grant date | Jun 13, 1989 |
| Priority date | — |
| Expiry date | Jun 28, 2008 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16C2340/18
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A roll assembly (50) for a fiber drafting machine is positioned on a spindle (51). First and second locking collars (52), (53) on spindle (51) define a space within which is positioned a pair of bearings (40). An annular bearing sleeve (55) is positioned in bearing contact with bearings (40). Bearing sleeve (55) includes a bore (56) from one end to the other which includes a stepped portion (57) defining two spaced-apart shoulders (58), (59). Flange (42) of the two bearings (40) seat flush against the innermost surface of locking collars (52), (53). A flange edge (45) of each of the bearings (40) is positioned in bearing contact with the inner walls of bearing sleeve (55) defining bore (56) to provide a radial bearing surface. Shoulders (58) and (59) abut and bear against shoulder (44) of flange (42) of bearings (40) and provide a thrust bearing surface along the axial length of spindle (51). Bearing (40) is preferably formed of a plastic resin, such as polyimide having a low coefficient of friction and a high temperature resistance. Bearing (40) is integrally formed by compression molding of a suitable resin powder, injection molding, or by machining.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.