Conical bobbin and method of forming same
OwnerJean P. Briandinventor
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Abstract
A cone-shaped bobbin is formed by rolling and gluing a paper or the like blank on a mounting mandrel with the cone being formed with a decreasing number of layers of paper or the like from bottom to top. Three embodiments of the blank are disclosed respectively in the shape of a crescent, a half-crescent, and a comma.
Claims18
A process for the manufacture of a cone-shaped bobbin for use in the winding of textile threads or the like comprising the steps of cutting of a web of paper or cardboard into blanks having a predetermined shape which when wound on a forming mandrel provides a helical arrangement in which the large end of the cone thus formed contains a larger number of layers of the blank than does the small end of the said cone and then winding the blank onto a forming mandrel to form a cone having a greater number of layers of the blank in its large end than its small end while simultaneously adhesively securing the layers to each other.
A method of making a frustoconical support element from a single strip of planar material comprising the steps of cutting the strip from a web of the planar material and winding it with overlapping turns into a conically converging shape, the steps being carried out in such a way that more turns of the strip are superposed at the larger end of the element than at its smaller end so as to give the element more layers thickness of the said material at its larger end than at its smaller end.
Dependencies are inferred from the claim text.