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US 5,209,760 AGranted
Injection molded abrasive pad
OwnerRonald C. Wiandinventor
Life of this patent
Estimating the term…
Abstract
A one-piece abrasive sheet and method of manufacture. The abrasive pad has a planar sheet portion with a plurality abrasive protrusion extending therefrom. The protrusions are intimately molded with the planar sheet portion to form a one-piece sheet. Thermoplastic and abrasive grit mixture may be used to form the sheet by injection molding.
Claims9
A one-piece abrasive pad comprising:
- a flexible planar sheet portion having a plurality of abrasive protrusions extending therefrom, said pad being produced by injection molding such that said protrusions are intimately molded with said sheet portion from a single flexible material said material including an abrasive material interspersed homogeneously therethrough such that as the pad wears down, abrasive material will be exposed.
A process of manufacture of an abrasive sheet comprising the steps of:
- a) providing an injection mold structure having a series of concavities therein for forming a pad shaped with abrasive protrusions extending therefrom;
- b) formulating a mixture of thermoplastic material and an abrasive grit material for injection molding of an abrasive pad with abrasive grit homogeneously dispersed therethrough;
- and
- c) injection molding an abrasive pad by forcing said mixture into said concavities for forming the abrasive sheet.
1 more element
Dependencies are inferred from the claim text.