1978-09-21
1980-09-02
Baldwin, Robert D.
93 63M, B65D 2704
Patent
active
042200750
ABSTRACT:
A construction comprising a sheet of two contiguous detachable leaf members is folded and separated to form slide and sleeve components of the calculator. Fold lines in the sheet are formed parallel to a separation or tear line that divides one leaf member from the other leaf member. In assembling the slide calculator the leaf members can be separated before or after the folding operation. A marginal portion provided on one of the leaf members enables the sheet to be secured by adhesive or other suitable form of attachment to a newspaper or magazine, a package container, or a package label. In various embodiments of the invention an information readout is provided on reverse sides of the calculator including one embodiment wherein the printed format of the slide and sleeve components is applied to one surface only of the respective leaf members. The slide calculator construction can be produced from a web that is successively divided into sheet members of predetermined size comprising the pair of contiguous leaf members, with simultaneous formation of the fold lines and the separation line in the direction of movement of the web.
REFERENCES:
patent: 1525696 (1925-02-01), Spencer
patent: 1666337 (1928-04-01), McDade
patent: 2335713 (1943-11-01), Vogel
patent: 2632963 (1953-03-01), Drury
Baldwin Robert D.
Rodman Philip
The Flexi-Group Inc.
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