Patent ID: 6065602
Filing Date: 2000-05-23
Classification: A23B,A23L,B65D,F25C

Abstract:
A method of mounting block cartons in freezing frames, comprising the steps of:inserting an unsecured carton blank into a freezing frame with side wall panels and end wall panels of the carton blank supported extending upwardly from a bottom panel of the blank by the freezing frame and with a corner flap which projects from an edge of one of said side wall panels and end wall panels folded into a position lying against an adjacent other one of said end wall panels and side wall panels at each corner; andinspecting the inserted carton blank to determine whether any corner flap has been positioned between the freezing frame and the wall panel against which it lies prior to filling of the blank with freezing material;wherein each corner flap has a side which is exposed within the freezing frame only if the corner flap is improper folded so that the wall panel against which it lies is outward of the corner flap relative to the freezing frame; wherein said side of the corner flap is provided with a surface appearance characteristic which is visually distinguishable from the appearance of the wall panels of the blank; and wherein said inspecting step is performed by examining the inserted carton blank and determining whether said surface characteristic is exposed within the freezing frame.