The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 11, 1980
Filed:
Sep. 19, 1978
Paul Fabrig, Neuffen, DE;
Womako Maschinenkonstruktionen GmbH, Nurtingen, DE;
Abstract
Note books having marginal holes are manipulated prior to insertion of spirals which are to be transformed into binders so as to convert the holes into arcuate passages or into V-shaped passages located in planes each making with a row of holes an angle which approximates the helix angle of the spiral. The conversion takes place in two stages, either at two discrete aligning stations or at a single station. If the conversion takes place at two stations, the holes receive the tips of pairs of mandrels which are thereupon pivoted to convert all holes into V-shaped passages. At the second station, a comb introduces its arcuate prongs into some or all of the V-shaped passages. If the conversion takes place at a single station, some of the holes receive the tips of mandrels introduced from one side and some of the holes receive the tips of mandrels introduced from the other side of the note book. The mandrels are thereupon pivoted to convert all holes into V-shaped passages. The mandrels are also pivoted about axes extending at right angles to the row of perforations in a sheet to place the V-shaped passages into planes making an oblique angle with the planes of the sheets. The oblique angle approximates or matches the helix angle of the spiral.