End construction for bellows type envelopes and the like

Details End construction for bellows type envelopes and the like End construction for bellows type envelopes and the like

B - Operations, Transporting

65

D

220/27

B65D 27/00 (2006.01) B65D 33/00 (2006.01)

Patent

CA 1037915

A BLANK FOR FORMING A BELLOWS TYPE ENVELOPE ABSTRACT OF THE DISCLOSURE A blank particularly suited for being folded into a bellows-type envelope by automatic machinery is provided. The blank includes longitudinal and latitudinal score lines for defining inward and outward folding of the blank. Further score lines define isosceles triangles which are adapted to be folded along the altitudes of the triangles and secured to define a bellows-type corner fold.

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