US 4,317,270 A · Method of making an elastic roller

Abstract

An elastic roller composed of an axial core member and an elastic, liquid retentive layer of foam structure with uniform layer thickness surrounding the circumference of said core member, said elastic roller further comprising a flexible, liquid permeable member in the form of a cylinder or sleeve having an inner diameter smaller than the outer diameter of said roller, said flexible member being disposed to cover the circumference of said roller and having extensions extending beyond both side ends of said roller and being shrunk along the ends of said elastic foam structure layer at both sides, respectively, so as to cover also said side ends of the layer with said flexible member. A method of making the elastic roller is also disclosed.

Claims8

Dependent claims

A method of making an elastic roller comprising the steps of forming a roller body by overlaying an axial core member with an elastic, liquid retentive layer of foam structure having uniform thickness surrounding the circumference of said core member;

inserting the formed roller body into a sleeve of liquid permeable, flexible member having a total length larger than axial length of said roller body and having an inner diameter smaller than the outer diameter of said roller body;
shrinking said sleeve at its portions extending beyond the both side ends of the inserted roller body along the both ends of said roller body while heating said portions;
and folding back the free ends of said shrunk sleeve into a hollow room of said core member and securing said free ends onto the wall of said core member by pressure.

Dependencies are inferred from the claim text.

Method of making an elastic roller

Life of this patent

Method of making an elastic roller

Life of this patent

Abstract

Claims8