Foot for molded plastic furniture
A foot for molded plastic furniture has a pad portion made of a first plastic or thermoplastic rubber and an anchor portion made of a second harder plastic or metal. The anchor has a base with a substantially flat surface that is bonded to a substantially flat top surface of the pad. Preferably the anchor portion and pad portion are co-extruded. A projection having at least one rib extends from the base of the anchor and is inserted into a cavity in a furniture leg creating a reliable mechanical fit which resists removal of the foot from the leg.
1. A method for inserting an article into a cavity in molded plastic furniture, the cavity defined by a plurality of sidewalls comprised of a first sidewall positioned opposite a second sidewall, the sidewalls comprised of a first plastic having a first hardness and the article having a body and an anchor portion attached to the body, the anchor portion made of one of a second plastic and a metal having a second hardness which is harder than the first hardness, the anchor portion comprised of a base, a projection extending from the base and having an outer surface that defines a cross-sectional shape of the projection; and a plurality of wedging surfaces on the outer surface of the projection, the method comprising:
forming molded plastic furniture by a molding process such that the molded plastic furniture defines the cavity and the first sidewall and the second sidewall of the cavity;
positioning the anchor portion adjacent the cavity before the sidewalls have fully hardened after the molded plastic furniture has been released from a mold used to make molded plastic furniture;
applying a force to the anchor portion to cause the anchor portion to move into the cavity, the cavity and the wedging surfaces being sized and positioned so that as the anchor portion moves into the cavity the wedging surfaces cause the first sidewall and the second sidewall to be forced apart from one another to permit movement of the anchor portion into the cavity; and
removing the force from the anchor portion, such that after the force is removed the wedging surfaces will have formed permanent indentations in the first sidewall and the second sidewall.
2. The method of claim 1 also comprising forming at least one rib on each of the first sidewall and the second sidewall such that the wedging surfaces form permanent indentations in the ribs after the force has been removed from the anchor portion.
3. The method of claim 2 wherein there are a pair of ribs on each of the first sidewall and the second sidewall.
4. The method of claim 3 wherein the cross-sectional shape of the projection is rectangular.
5. The method of claim 2 wherein the projection is cylindrical and the at least one rib is at least one thread.
6. The method of claim 1 wherein the force is applied to the anchor portion by hammering the body to which the anchor portion is attached.
7. The method of claim 1 wherein the anchor portion has a Shore D durometer of at least 74.
8. The method of claim 1 wherein a cross-section of the projection is a polygon, a circle or an oval.
9. The method of claim 1 wherein the body is comprised of a pad having a hardness which is less than the hardness of the anchor portion.
10. The method of claim 1 wherein the anchor portion and the body were formed by co-extrusion of the body and the anchor portion.
11. The method of claim 1 wherein the anchor portion is made of a plastic selected from the group of plastics consisting of polyvinyl chloride, nylon, filled polypropylene, acrylonitrile butadiene styrene, polycarbonate, mixtures thereof or combinations thereof.