Claims
- 1. In a grinding and polishing machine having a base with a flat surface, an abrasive carrier mounted for rotation about an axis which is orthogonal to said surface, said carrier comprising:
- (a) a platen mounted on said base for rotation about said axis;
- (b) a stop surface on said platen extending in a plane which is parallel to said surface;
- (c) a plate disposed on said platen, said plate having an outermost, flat, planar face;
- (d) an abrasive on said outermost face; and
- (e) resilient means for urging said plate away from said base member and said outermost face toward said stop surface whereby said stop surface positions and engages the periphery of the outermost face of said plate and said plate is positioned on said platen parallel to said flat surface.
- 2. An apparatus as defined in claim 1 wherein said platen is cup shaped, with a bottom surrounded by a wall, said stop surface extends inwardly from said wall, and said resilient means is compressed between said bottom and said plate.
- 3. An apparatus as defined in claim 2 wherein said wall terminates in a machined face and said stop surface is formed by a ring attached to said wall and located by said machined face.
- 4. An apparatus as defined in claim 1 wherein the abrasive and the stop surface lie in substantially the same plane.
Parent Case Info
This is a continuation of application Ser. No. 444,647, filed Dec. 1, 1989, now abandoned, which was a division of application Ser. No. 267,962, filed Nov. 7, 1988, now U.S. Pat. No. 4,905,415.
US Referenced Citations (3)
Number |
Name |
Date |
Kind |
2641878 |
Radabaugh |
Jun 1953 |
|
2749684 |
Schuhmann |
Jun 1956 |
|
4798025 |
Lokken et al. |
Jan 1989 |
|
Foreign Referenced Citations (1)
Number |
Date |
Country |
0201762 |
Nov 1984 |
JPX |
Divisions (1)
|
Number |
Date |
Country |
Parent |
267962 |
Nov 1988 |
|
Continuations (1)
|
Number |
Date |
Country |
Parent |
444647 |
Dec 1989 |
|