Folding machine for box blanks

Details Folding machine for box blanks Folding machine for box blanks

1976-04-06

1977-10-11

Lake, Roy

93 51R, F01B 1900

Patent

active

040529320

ABSTRACT:
A folding machine for folding the front and rear panels of a box blank prior to folding the lateral panels thereof including a pair of pull rolls for advancing successive ones of such blanks, pivotable rising fingers just beyond the pull rolls for initiating upward folding of the front panel along a transverse score line in the blank, a folding beam for intercepting the partially folded front panel of the blank and bending it backward against the body portion of the blank as it continues to advance, a second pair of pull rolls downstream from the folding beam for advancing the partially folded blank and pressing the front panel against the body of the blank, a pivotable stop downstream from the second pair of pull rolls for momentarily stopping advancement of the blank, a second folding beam just downstream from the second pair of pull rolls for supporting the rear panel of the blank to be folded, and a rotatable roller lever adjacent the second folding beam for pushing the body of the blank downwardly against an endless conveyor to cause the rear panel to fold upwardly along a transverse score line in the blank, all being arranged so that the forward folded panel of the next successive blank engages the partially folded upstanding rear panel of the first blank to complete folding thereof against the body of the first blank and thereafter, the pivotable stop being arranged to release the first blank for further advancement and to stop the advance of the second blank for folding of its rear panel.

REFERENCES:
patent: 2911889 (1959-11-01), Welsh
patent: 3097576 (1963-07-01), Borke
patent: 3122068 (1964-02-01), Dunn
patent: 3122069 (1964-02-01), Lopez
patent: 3672266 (1972-06-01), Klapp
patent: 3901134 (1975-08-01), Reizenstein et al.
patent: 3902407 (1975-09-01), Trosdorff
patent: 3964374 (1976-06-01), Stolkin et al.

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