Flexible abrasive pad

• US 4,459,987 A
• Filed: 03/10/1982
• Issued: 07/17/1984
• Est. Priority Date: 03/10/1982
• Status: Expired due to Term

• Current Assignee: William W. Haefliger
• Original Assignee: William W. Haefliger
• Inventors: Pangburn, William E.
• Primary Examiner(s): Pellegrino, Stephen C.
• Application Number:
  US06/356,830
• Time in Patent Office: 860 Days
• Field of Search: 128/358, 51/400, 51/401, 51/402, 51/394-399, 51/403-407, 132/76.4
• US Class Current: 606/131
• CPC Class Codes: A61B 17/54 Chiropodists' instruments , e.g. pedicure chiropractic devices A61H1/008
• CPC Class Codes: B24D 15/04 resilient; with resiliently-mounted operative surface

Abstract

A flexible cosmetic abrasive sheet comprises

(a) a tough, flexible sheet of silicone polymer,

(b) abrasive particulate carried by and protruding from at least one side of the sheet and exposed for rubbing contact with human skin during use of the sheet.

A layer of reticulated, resiliently compressible foam may be attached to the abrasive sheet, for light dermabrasion.

Claims

1. A flexible cosmetic abrasive sheet comprising

(a) a tough, flexible sheet of silicone polymer,

(b) abrasive particulate carried by and protruding from at least one side of the sheet and exposed for rubbing contact with human skin or other work during use of the sheet,

(c) said sheet being stretchable, and being formed from a layer of initially incompletely cured silicone polymer with which said particulate has been combined to adhere to the sheet, the sheet then allowed to cure.

2. The sheet of claim 1 which has pad configuration.

3. The sheet of claim 2 which includes a second sheet as defined in (a) of claim 1 and abrasive particulate carried by and protruding from at least one side of the second sheet, the two sheets being bonded together so that the abrasive is exposed at opposite sides of the pad.

4. The pad of claim 3 wherein said abrasive particulate consists of pumice.

5. The sheet of claim 3 wherein said two sheets are spaced apart, and including a bonding layer sandwiched between said sheets.

6. The sheet of claim 5 wherein said bonding layer consists of a matte.

7. The sheet of claim 1 wherein said abrasive particulate consists of pumice or the like.

8. The sheet of claim 1 wherein abrasive particulate is also carried by and protrudes from the opposite side of the sheet and is exposed at said opposite side.

9. The sheet of one of claims 8 and 3 wherein the particulate at one side of the sheet has a first fineness, and the particulate at the opposite side of the sheet has a second fineness, said first and second finenesses being different.

10. The sheet of claim 1 wherein the sheet thickness is between 0.015 and 0.100 inches.

11. The sheet of claim 10 wherein the sheet thickness is approximately uniform over the sheet area, and is between 0.020 and 0.060 inches.

12. The sheet of one of claims 1-8 including a stretchable and flexible matte on which said layer is formed.

13. The method of forming flexible cosmetic abrasive sheet, that includes

(a) forming a layer of incompletely cured silicone polymer,

(b) combining abrasive particulate with said layer to adhere thereto, and

(c) allowing said layer to cure to form a sheet with said particulate exposed at one side thereof for intimate rubbing contact with human skin during use.

14. The method of claim 13 wherein said layer is initially in liquid state and contains a curing agent, and said (c) step includes allowing the liquid to polymerize.

15. The method of claim 14 wherein said (a) step includes pouring said liquid onto a polyethylene surface at room temperature.

16. The method claim 13 including forming a second sheet as defined in claim 13 and bonding said two sheets to form a composite sheet.

17. The method of claim 13 wherein said (b) step is carried out by applying the particulate to the surface of said layer prior to completed curing thereof.

18. The method of claim 13 wherein said layer is formed to have a thickness between 0.020 and 0.060 inches after curing.

19. The method of claim 13 which further includes, prior to said (c) step, reducing the thickness of said layer.

20. The method of claim 19 wherein said reduction in thickness is effected by passing said layer between calender rolls.

21. The method of claim 20 including removing excess particulate from the sheet after it is passed between said rolls.

22. The method of one of claims 13 and 20 wherein said (b) step includes pressing the particulate into said layer, the particulate consisting essentially of pumice.

23. The method of one of claims 13, 19 and 22, that includes forming said layer on a flexible matte.

24. The method of one of claims 13, 19 and 22 that includes forming said layer on a flexible and stretchable matte, and pressing the particulate into the layer and toward the matte.

25. A composite cosmetic device, comprising

(a) a tough, flexible first sheet of silicone polymer, and having first and second sides,

(b) abrasive particulate carried by and protruding from the first side of the sheet and exposed for rubbing contact with human skin or other work, said sheet being stretchable, and being formed from a layer of initially incompletely cured silicone polymer with which said particulate has been combined to adhere to the sheet, the sheet then allowed to cure, and

(c) a second sheet of resiliently compressible, reticulated foam attached to said silicone polymer sheet and projecting from said second side thereof.

26. The device of claim 25 wherein said foam consists essentially of polyurethane and has exposed fibrous edges.

27. The device of claim 25 wherein the foam is fibrous throughout, and has at least about 90% void space.

28. The device of claim 25 wherein said particulate consists of pumice or the like.

29. The device of claim 25 including a third sheet, the second sheet having opposite sides one of which is attached to said first sheet, and the other of which is attached to the third sheet.

30. The device of claim 29 wherein the third sheet consists essentially of silicone polymer, and abrasive particulate carried by the third sheet and exposed at the side thereof opposite said second sheet.