US 4,231,174 AGranted

Protective holder for sheet material

OwnerEarl C. Thompsoninventor

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Abstract

A flat rectangular envelope has at least one wall which is transparent; the envelope in one form being fabricated from plastic film. Elongated mounting margins are formed along two side edges of the envelope, each having longitudinally spaced mounting apertures to enable the mounting of the envelope on a suitable support. The mounting apertures may be spaced to enable securing either edge of the envelope in a three-ring binder, or the envelope may be secured to other supports by means of ties. The mounting margins include some reinforcing means for improving the tear resistance of the mounting apertures. A plastic zipper is provided to close the top openable edge of the envelope. One wall may be formed from a magnetic material enabling the mounting of magnetic markers on the exterior of the transparent wall. The envelope may be secured to a rigid mounting board with coacting cords, which enable the envelope to be flip-flopped on the board without removal from the board.

Claims13

Dependent claims

In combination with a support member, a protective holder for sheet material comprising

a flat rectangular envelope having three closed edges and one open edge;
at least one wall of said envelope being fabricated from a transparent material;
said envelope having elongated mounting margins at opposite side edges thereof;
said mounting margins each having a plurality of longitudinally spaced mounting apertures;
said mounting apertures including two spaced pairs, each pair including apertures adjacent to adjacent corners thereof;
tie means for securing said envelope to said support member, including a plurality of support cords mounted on said member in parallel relation to each other;
said envelope disposed in generally overlying relation to said member, with each aperture pair disposed for coacting relation with a respective cord pair;
one cord of each cord pair passing through one mounting aperture of a respective aperture paid and overlying one face of said envelope, in the same manner;
and the other cord of each cord pair passing through the other mounting aperture of a respective aperture paid and overlying the other face of said envelope, in the same manner;
said cord pairs and said envelope aperture pairs coacting to enable said envelope to be flip-flopped relative to said support member and to said support cords.

7 more elements

Dependencies are inferred from the claim text.