Fabrication of panels, binders, trays, frames, boxes and...

Details Fabrication of panels, binders, trays, frames, boxes and... Fabrication of panels, binders, trays, frames, boxes and...

B - Operations, Transporting

31

D

93/83

B31D 3/00 (2006.01) B42D 1/08 (2006.01) B42F 11/00 (2006.01) B42F 15/00 (2006.01)

Patent

CA 1175276

FABRICATION OF PANELS, BINDERS, TRAYS, FRAMES, BOXES AND OTHER ASSEMBLIES FROM SHEET MATERIAL AND CHANNEL-SHAPED EDGING STRIPS ABSTRACT OF THE DISCLOSURE The invention relates to the fabrication of panels trays and other assemblies from fibreboard or other sheet material by folding-back edge portions of the sheet to provide marginal portions of increased thickness and sub- stantially uniform width of which the inner edges define retaining abutments, each marginal portion being located in a channel of respective channel-shaped edging strips each having a lip or rib which engages over and with the retaining abutment of the marginal portion to resist separation of the strip from the edge of the sheet in the direction perpendicular to said edge. The edging strips are assembled to an edge by forcing the channel over the marginal portion. Adjacent edging strips engage to resist sliding movement.

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