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Home Screen Walls Method-of-manufacturing-a-door-edge-guard

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 Method of manufacturing a door edge guard

Details
Inventors: Adell, Robert;
Assignee: U.S. Product Development Co. (Novi, MI)
Primary Examiner: Bell; James J.
Assistant Examiner:
Attorney, Agent or Firm: Olsen and Stephenson

A method of manufacturing a door edge guard of the type particularly suitable for protection of the edge of an automobile door from paint chips. The method is an improvement over the technique of using separate manufacturing procedures to produce a plastic U-shaped inner channel (liner) configured to mate with a U-shaped metal outer channel. The method of the invention comprises the steps of roll-forming a metal element of an edge guard into a U-shaped channel element and bonding a plastic material to at least a portion of the inner surface area of the U-shaped metal element prior to completion of the roll-forming operation. The bonding may take place before roll-forming is begun.

DETAILED DESCRIPTION The method of the invention forms a door edge guard that has a metal outer U-shaped channel element and an inner plastic U-shaped channel element.
The outer metal channel is roll-formed and the inner plastic channel is bonded to at least a portion of the inner surface of the outer metal channel element prior to completion of the roll-forming operation.
After the inner plastic channel has been at least partially bonded to the outer metal channel, the ends of the legs of the outer channel can be bent inwardly upon themselves to round the ends of the legs and form an edge guard of improved appearance.
The plastic inner channel may be bonded to the end of the inner surface of the outer channel either before or after the bending of the ends.
If it is bonded to the outer channel before the bending operation, then a double layer of dielectric material is formed at the ends of the legs of the edge guard.
The plastic (dielectric) material may be made to extend back around the inner surfaces of the ends of the edge guard legs so that a layer of dielectric material will be located between the edge guard and the door upon installation.
The invention may be better understood by reference to the detailed description which follows and to the drawings.



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