Expansion folder with accordian-pleat backbone
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United States of America Patent
Stats
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Aug 18, 1981
Grant Date -
N/A
app pub date -
Dec 13, 1979
filing date -
Dec 13, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A backbone construction for a file folder including a pair of parallel grooves on the inside of the folder between the backbone portion and the front and rear leaves, slots extending inwardly from the ends of the backbone portion, a flexible tape overlying both the inner and outer surfaces of the backbone and the inner and outer surfaces of the front and rear covers adjacent to the grooves, an elongated slit located centrally between the grooves and parallel thereto and extending through the tape on the inner surface of the backbone and through a portion of the backbone and being in line with the slots, and perforations located between the ends of the slit and the slots.
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