3908523 is referenced by 152 patents and cites 7 patents.

A method of forming a liquid-tight up comprising a cup-like body and a sheet member disposed around the peripheral surface of the cup-like body, with the sheet member being corrugated to provide a plurality of concavo-convex flutes, whereby air compartments are provided between the peripheral surface of the cup-like member and the inner surface of the sheet member, comprises forming the sheet member by cutting, from a planar sheet, a planar blank having a width in excess of the peripheral length of the circular bottom of an inner cup member and a length substantially equal to the height of the side wall of the inner cup member. The opposite ends of the planar blank are then united in overlapped relation to form a circular cross-section sleeve constituting an outer member and, after such uniting, the blank is formed with concavo-convex flutes to form a structure whose peripheral surface is corrugated. The inner and outer members are then telescoped to form a composite liquid-tight cup with heat insulating air passages extending upwardly along the outer surface of the side wall of the inner cup member.

Method of making liquid-tight cup
Application Number
Publication Number
Application Date
November 5, 1973
Publication Date
September 30, 1975
Shikaya Yukihiro
McGlew and Tuttle
Dai Nippon Insatsu Kabushiki Kaisha
B65D 03/00
B31B 07/00
B65D 03/00
B65D 03/22
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