| 摘要 |
A drawing material backing (1) is provided which serves to make technical and diagrammatic drawings and is provided on one side with an impressed orthogonal grid (2), which consists of defining pyramid-shaped embossed elevations (8) and has a grid line spacing (3) of 0.5 or 1 millimeter, so that the free-hand drawing of straight lines or of lines intersecting at right angles and with a selected spacing by means of a pencil, ballpoint pen or a paste-applying pen on a paper sheet applied to the backing will be facilitated. To improve the guidance of drawing implements having writing points or writing balls (9, 10) which differ greatly in diameter and to prevent an impression into the drawing paper, the side faces (5, 5a) of the grooves include a steeper angle (6) next to the bottom (4) of the groove and a flatter angle (7) in their upper portion so that the embossed elevations have the shape of pyramids (8) having angled sides. The paper sheet is retained by a replaceable adhesive tape (11), which with an adhesive coating having a stronger adhesive force has been stuck to the backing at one longitudinal edge on the surface provided with the grid and which carries on its free side an adhesive coating that has a weaker adhesive force. (FIG. |
