Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Reexamination Certificate
2007-02-13
2007-02-13
Fischer, Justin (Department: 1733)
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
C156S252000, C156S254000, C156S256000, C156S257000, C053S452000, C053S455000, C053S459000
Reexamination Certificate
active
10272288
ABSTRACT:
A method for connecting the ends of flat tubular film sheets made of thermoplastic plastic that are equipped with side creases with one another by means of a lateral welding seam in such a manner that the interior creases remain permeable from the exterior even in the connection area. The end of one sheet is equipped with cuts separating the interior edges of the side creases. The end of the other sheet is inserted or placed into the separated area in such a way that both walls of the cut sheet overlie the inserted end, with a layer of each side crease of the end area of the inserted tubular film between the walls. Separating layers are inserted or placed into the side creases of the inserted end area, and the ends of the two sheets are then connected with one another by means of a lateral welding seam.
REFERENCES:
patent: 3691705 (1972-09-01), Luckey
patent: 5009632 (1991-04-01), Kruessel
Fischer Justin
Jacobson & Holman PLLC
Windmoeller & Hoelscher KG
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