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165results about "Writing underlays" patented technology

Multi-function plastic writing paper board and manufacturing method thereof

The invention relates to a multi-function plastic writing paper board and a manufacturing method thereof, belonging to the field of writing or drawing instruments. The manufacturing method comprises the following steps: abrading the surface layer at one side or both sides of plastic paper or a plastic paper board to form an abraded layer, washing with water, removing dust on the surface layer, and airing for later use; spraying a layer of adhesive on one side of the abraded layer; or printing writing grids or patterns on the abraded layer before spraying a layer of adhesive; and spraying a layer or two layers rock powder-mixed adhesive on the abraded layer, and then spraying a development layer; or directly spraying a development layer on the adhesive layer. Thinner materials can be manufactured into plastic writing paper, thicker materials can be manufactured into plastic writing board, and the manufacturing method can also be used for manufacturing various multipurpose learning tools which are used for writing and combines the functions of other learning stationery. The multi-function plastic writing paper board can be used with various writing instruments, so that people can write and draw on the surface of the paper board with any writing instrument and can especially practice Chinese brush calligraphy with ordinary water instead of ink.
Owner:胡雪辉

Device for drawing lines on a sized sheet of paper and maintaining registration of the paper when it has been removed and is being replaced on the device

Improvements in the instruments for drawing lines using grooves providing the presentation of lines that may be drawn by placing a sheet of paper over the presentation and engaging the sheet of paper with the point of a writing tool with sufficient force to press the engaged part of the paper into a selected groove and then moving the writing tool point within the line, depositing pencil lead or ink from the end of the writing tool on the paper that is pressed into the selected groove to form a line on the paper. The improvements include the provision of registration marks on a clipboard which has the presentation of grooves for lines to be drawn on the upper side of the clipboard, the registration marks acting as guidelines for the precise placement of the sheet of paper on which lines are to be drawn and its retention in that placement by a clip attached to the end of the clipboard and engaging the end of the sheet of paper for such retention. This precise placement of the sheet of paper allows a sheet of paper that has had one or more lines drawn on it in the manner noted above to be removed and later replaced on the clipboard in precisely the same location as it had when the line or lines were earlier drawn on it, with the result that any additional lines to be drawn will be in perfect relation to the lines earlier drawn, and the later drawings and the earlier drawings appear to have been made just as if the sheet of paper had not been removed between such drawings. Various shapes of such marks may be employed. Another major improvement is the provision of a turntable as a part of the upper surface of the clipboard, with the presentation of the array of grooves being in the upper surface of the turntable, and the turntable may be rotated under the sheet of paper to allow the drawing of lines at different angles to each other. The amount of rotation of the turntable is limited to a desired amount of arcuate movement, within ranges of 90°, 180°, 270°, or 360°. Another improvement is the ability to use different turntables having different types of arrays of grooves which are easily substituted as desired, not requiring completely different clipboard assemblies.
Owner:SKETCH IT
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