Sheet holders

a technology for applied in the field of holding and displaying sheets, can solve the problems of not being able to perform display changes, not being able to hold ideally, and being difficult to carry one hand, so as to improve the holding capacity of the sheet holder, prevent the slippage of vertically mounted art sheets, and increase the friction between art sheets and rubber surfaces
US20090265972A1Inactive Publication Date: 2009-10-29CHANG CHERNG
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
CHANG CHERNG
Publication Date
2009-10-29
Estimated Expiration
Not applicable · inactive patent

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Abstract

A novel sheet holder either with or without a board. The sheet holder comprises a base angle plate and a holding angle plate, connected by extension springs for toggling said holding angle plate between a closed position for holding said sheet and an open position for removing said sheet. Two pegs and a rubber block with groove are installed for increasing the number of held sheets and more securely holding the mounted sheets. The present sheet holding board can be rotatably mounted to the back of a picture frame with locking feature. The sheet holder without board can be applied for holding advertisement sheet for indoor and outdoor display. Novel art hanging and control system will raise and lock the art for display, and lower it to a reachable level for display change. This art may include an art sheet, 3D art, or a computer monitor showing advertisement message. For outdoor display, a clear vinyl cover can be employed for holding an art sheet and protect it from UV radiation, rain and wind damage. A spring or weight load can be employed to maintain the art to be displayed in its uppermost position and leveled. Such spring and weight load can also be used in a flagpole for such benefit.
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Description

[0001] This is a continuation-in-part of patent application Ser. No. 11 / 375,906, filed Mar. 15, 2006 and patent application Ser. No. 12 / 156,307, filed May 31, 2008CLAIM PRIORITY

[0002] Provisional Patent Application No. 61008767, filed Dec. 24, 2007

[0003] Provisional Patent Application No. 61070973, filed Mar. 26, 2008BACKGROUND OF THE INVENTION

[0004] This invention relates in general to holding and displaying sheet arts, and more specifically, to sheet holders for holding and displaying the sheet arts. Here the sheet arts may include art sheets, printer outputs, advertisement sheets, and any sheet materials that are to be displayed.

[0005] The most well-known type sheet holding board is a commonly termed clipboard. It is a thin board that is typically slightly larger than a pad of sheets of paper. Most pads used have a letter size of 8.5″×1″ (21.6 cm×27.9 cm) and A4 size of 21.0 cm×29.7 cm (8.27″×11.7″). Each clipboard has a large clip at the top for holding the sheet pad. In addition to ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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