Patent ID: 9409345
Filing Date: 2016-08-09
CPC Classification: B29C,B29L,E06B

Claim Text:
1. A system for fabricating the corner of a plastic window frame, said system comprising a metal platen having opposed sides and that is for heating and melting adjacently disposed frame pieces by being inserted between the adjacently disposed frame pieces as the adjacently disposed frame pieces are brought into contact with respective opposed sides of the metal platen in order to melt adjacent surfaces of the adjacently disposed frame pieces, said adjacently disposed frame pieces, once heated and melted, being drawn together to form the corner of the plastic window frame, a release layer secured to the opposed sides of the metal platen and disposed between the respective adjacently disposed frame pieces and the opposed sides of the metal platen to prevent adherence between the metal platen and frame pieces, said release layer comprised of a release film having a work area corresponding to an area where the adjacently disposed frame pieces are to be joined and a non-work area outside of the work area, and at least one adhesive strip disposed within the non-work area of the release film for securing the release film to the metal platen while the work area is absent any adhesive between the release layer and the metal platen, wherein the release film is comprised of a Teflon a polytetrafluoroethylene impregnated fiberglass film, and the at least one adhesive strip is disposed only in the non-work area of the release film, wherein each frame piece comprises a vinyl frame piece, wherein the metal platen is heated to a temperature in a range of 400-500 degree F., wherein the at least one adhesive strip is disposed in a border pattern about only three sides of the work area with one side of the work area free of adhesive, and wherein the at least one adhesive strip is comprised of three adhesive strip pieces with two of the adhesive strip pieces being disposed across from each other and the third adhesive strip piece being disposed substantially transverse to the two adhesive strip pieces.