Method of making a spiral binder

Details Method of making a spiral binder Method of making a spiral binder

1978-04-11

1979-01-30

Hoag, W. E.

Plastic and nonmetallic article shaping or treating: processes

With severing, removing material from preform mechanically,...

264320, 264339, B29C 1702, B29C 1710

Patent

active

041372891

ABSTRACT:
Method of making a removable spiral plastic binder which is designed to be received into a channel member. The channel member is mounted to the backbone of a book cover. The removable binding, which is slidably received in the channel member, has a plurality of curled loops for retaining paper leaflets such as sheets of blank checks to the book cover. The removable binding has retaining tabs extending from a base portion below the loops. The tabs are bent such that they all lie substantially in the same plane to facilitate sliding of the binding into the channel member. The removable binding including the retaining tabs, base portion and curled loops is formed from a single, contiguous sheet of plastic material.

REFERENCES:
patent: 2354094 (1944-07-01), Thomas
patent: 2491527 (1949-12-01), Spinner
patent: 2491528 (1949-12-01), Spinner
patent: 2676360 (1954-04-01), Emmer
patent: 2686932 (1954-08-01), Zaleski

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