Wireworking – Article making or forming – Helix screwing through row of loops or openings
Patent
1977-11-25
1979-07-17
Larson, Lowell A.
Wireworking
Article making or forming
Helix screwing through row of loops or openings
140 927, 11 1R, B21F 1500
Patent
active
041611969
ABSTRACT:
Note books or pads whose leaves are held together by spiral binders are produced during transport of their constituents along an elongated path between two parallel planes. Stacks of elongated sheets are inserted into a first portion of the path so that the sheets extend transversely of the direction of their stepwise advance. Each stack is thereupon subdivided into several smaller stacks, and each smaller stack is provided with a row of perforations extending transversely of the longitudinal direction of the path before the smaller stacks are reassembled into larger stacks each containing a number of sheets corresponding to the number of leaves in a pad. The reassembled larger stacks are thereupon severed in one or more planes which are parallel to the planes flanking the path, and the perforations of each group of resulting pads are aligned in one or more stages for introduction of elongated spirals which are severed to yield discrete binders, one for each pad of the respective group. The end portions of the binders are bent toward each other immediately following the spiral severing step. The first section of the path is planar, and the second section of the path is defined by an indexible turret which is adjacent to the aligning, spiral inserting and spiral severing instrumentalities.
REFERENCES:
patent: 2963049 (1960-12-01), Biel et al.
patent: 3924664 (1975-12-01), Pfaffle
patent: 3924665 (1975-12-01), Spuhl
patent: 3972109 (1976-08-01), Sickinger
Kontler Peter K.
Larson Lowell A.
Womako-Maschinenkonstruktionen GmbH
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