| 摘要 |
1,250,750. Rollers. J. BLUM. 21 April, 1970 [25 April, 1969], No. 19101/70. Heading F2U. A roller for a drawing-out rail comprises an annular outer steel member 1 and an inner member of plastics material, such as polyamide, comprising a bush portion 2 and an axially projecting flange portion 5 on at least one face to provide a rubbing surface. As shown, the flange portion 5 has an integral lip 4 entering an annular recess 3 in the member 1 and a smaller flange 5<SP>1</SP> is provided on the opposite side of the roller, but these features may be omitted, Fig. 2 (not shown). The plastics bushing may be formed by injection moulding between the member 1 and an axial pin defining the bore 6. The junction between nembers 1, 2 may be circular or non-circular. |
