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US 4,056,894 AGranted
Method of producing a card file
OwnerEdward K. Sundstrominventor
Life of this patent
Estimating the term…
Abstract
A novel card file is provided of a substantially rigid sheet having a plurality of parallel tandem slits. The length of the slits is slightly less than the length of the cards. Standard index cards without notches or cut-outs, are inserted, lined up parallel into the slits, and pressed into place providing a flippable card file.
Claims11
A method of producing a card file comprising:
- a. cutting parallel tandem slits in a substantially rigid sheet,
- b. the slit length being slightly shorter than the width of the cards to be inserted therein,
- c. providing indenting means at the ends of the slits,
- d. placing cards, one or more to each slit, which will bow slightly due to their being slightly longer than the length of the slits,
- e. pressing on the cards in the center and sliding the pressure out toward the edges of the cards to seat the cards in the slit and indenting them to form holding and hinge points in the cards.
2 more elements
A method of producing a card file comprising:
- a. cutting a plurality of parallel tandem slits in a substantially rigid sheet of polyvinyl chloride polymer, wherein the width of the slits is approximately equal to the thickness of cards to be inserted therein, and wherein the slit length is slightly shorter than the width of the cards to be inserted therein,
- b. providing indenting means at the ends of the slits,
- c. placing cards in the slits one or more to each slit, whereby the cards will bow slightly due to their being slightly longer than the length of the slits,
- d. pressing on the cards in the center and sliding the pressure out toward the edges of the cards to seat the cards in the slit and indenting them to form holding and hinge points in the cards.
1 more element
Dependencies are inferred from the claim text.