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US 5,505,747 AGranted
Method of making an abrasive article
AssigneeMinnesota Mining and Manufacturing Company
InventorsJason A. Chesley, Donald R. Bell, Harold E. Rude, William F. Sheffield, David F. Slama, Alan N. Stephens
Life of this patent
Estimating the term…
Abstract
A method for making an abrasive article is disclosed, including the steps of providing a substrate having abrasive means on one surface, and providing a plurality of hooking stems on the opposite surface thereof. Several illustrative variations of the inventive method are disclosed.
Claims64
A method of making an abrasive article, comprising the steps of:
- a) providing an abrasive sheet having first and second major surfaces, the first major surface including means for abrading a surface;
- b) molding a base sheet having opposed first and second major surfaces, the base sheet including a plurality of stems projecting from the first major surface, the stems each including a stem diameter and a distal end remote from the base sheet;
- c) bonding the second major surface of the base sheet to the second major surface of the abrasive sheet;
- and
- d) deforming the distal end of each stem to thereby provide each stem with a hooking portion to enable the stem to releasably hook an opposed engaging structure.
2 more elements
A method of making an abrasive article, comprising the steps of:
- a) providing an abrasive sheet having first and second major surfaces, the first major surface including means for abrading a surface;
- b) molding a base sheet by:
- i) providing a mold having a plurality of cavities formed in the peripheral surface thereof, said cavities adapted to form stems;
- and
- ii) coating a flowable material over the peripheral surface and into the cavities of the mold to form a base sheet having a plurality of stems;
- such that the base sheet comprises opposed first and second major surfaces and a plurality of stems projecting from the first major surface, the stems each comprising a stem diameter and a distal end remote from the base sheet;
- c) bonding the second major surface of the base sheet to the second major surface of the abrasive sheet;
- and
- d) deforming the distal end of each stem to thereby provide a head on each stem, such that the head has a circular periphery having a diameter at least 0.05 mm greater than the stem diameter to enable the stem to releasably hook an opposed engaging structure.
6 more elements
A method of making an abrasive article, comprising the steps of:
- a) providing an abrasive sheet having first and second major surfaces, the first major surface including means for abrading a surface;
- b) molding a base sheet by:
- i) providing a mold having a plurality of cavities formed in the peripheral surface thereof, said cavities adapted to form stems;
- ii) coating a flowable thermoplastic polymeric material over the peripheral surface and into the cavities to form a base sheet having a plurality of stems while evacuating air from the cavities to draw the material into the cavities;
- and
- iii) continuously cooling the mold to facilitate solidification of the base sheet and the stems;
- such that the base sheet comprises opposed first and second major surfaces and a plurality of stems projecting from the first major surface, the stems each comprising a stem diameter and a distal end remote from the base sheet;
- c) bonding the second major surface of the base sheet to the second major surface of the abrasive sheet;
- and
- d) deforming the distal end of each stem to thereby provide a head on each stem, such that the head has a circular periphery having a diameter at least 0.05 mm greater than the stem diameter to enable the stem to releasably hook an opposed engaging structure.
7 more elements
A method of making an abrasive article, comprising the steps of:
- a) providing an abrasive sheet having first and second major surfaces, the first major surface including means for abrading a surface;
- b) molding a base sheet by:
- i) providing a cylindrical mold having a plurality of cavities formed in the peripheral surface thereof, said cavities adapted to form stems;
- and
- ii) coating a flowable material over the peripheral surface and into the cavities to form a base sheet having a plurality of stems;
- such that the base sheet comprises opposed first and second major surfaces and a plurality of stems projecting from the first major surface, the stems each comprising a distal end remote from the base sheet;
- c) bonding the second major surface of the base sheet to the second major surface of the abrasive sheet;
- and
- d) deforming the distal end of each stem to thereby provide each stem with a hooking portion extending beyond the stem by at least 0.05 mm in at least one direction generally normal to the longitudinal axis of the stem to enable the stem to releasably hook an opposed engaging structure.
6 more elements
A method of making an abrasive article, comprising the steps of:
- a) providing an abrasive sheet having first and second major surfaces, the first major surface including means for abrading a surface;
- b) molding a base sheet by:
- i) providing a cylindrical mold having a plurality of cavities formed in the peripheral surface thereof, said cavities adapted to form stems;
- ii) coating a flowable thermoplastic polymeric material over the peripheral surface and into the cavities to form a base sheet having a plurality of stems while evacuating air from the cavities to draw the material into the cavities;
- and
- iii) continuously cooling the mold to facilitate solidification of the base sheet and the stems;
- such that the base sheet comprises opposed first and second major surfaces and a plurality of stems projecting from the first major surface, the stems each comprising a stem diameter and a distal end remote from the base sheet;
- c) bonding the second major surface of the base sheet to the second major surface of the abrasive sheet;
- and
- d) contacting the distal ends of the stems with a heated roll to deform the distal end of each stem to thereby provide a head on each stem, such that the head has a circular periphery having a diameter at least 0.05 mm greater than the stem diameter to enable the stem to releasably hook an opposed engaging structure.
7 more elements
Dependencies are inferred from the claim text.