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1. 发明授权

US3979832A Sliding surface for a drafting board 失效
标题翻译：用于牵引板的滑动面
公开(公告)号：US3979832A
公开(公告)日：1976-09-14
申请号：US657724
申请日：1976-02-13
申请人： Alejandro Arreguin
发明人： Alejandro Arreguin
IPC分类号： B43L5/02 , B43L5/00
CPC分类号： B43L5/025
摘要： A sliding surface for a drafting board allowing a draftsman to adjust a sheet of drawings on the drafting board by moving the drawing up and down without having to adjust or realign the drawing to maintain the square and straight lines thereof, the device consisting of a pair of oppositely wound rollers disposed in tandem spaced apart parallel relationship at the top and bottom edges of a drafting board and over which a flexible sheet of material is wound so as to overlie the top surface of the drafting board and provide a sliding surface thereon in that a sheet of drawings taped to the sliding surface will move therewith as it passes in an upward direction to roll onto the top roller and a downward direction to roll onto the bottom roller so that the top of the sheet of drawings may be brought to the bottom portion of the drafting table, and vice versa, thus allowing the draftsman to move the sheet of drawings up and down along the drafting board without having to readjust or realign the drawing sheet.
摘要翻译：用于牵伸板的滑动表面，允许牵伸工人通过上下移动图形来调整牵伸板上的图纸，而不必调整或重新对准图形以保持其平方和直线，该装置由一对相对卷绕的辊在牵伸板的顶部和底部边缘处以串联的间隔开的平行关系布置，并且在其上缠绕柔性材料片以覆盖在牵伸板的顶表面上并在其上提供滑动表面，其中被粘贴在滑动表面上的一张图纸将随着向上的方向移动而滚动到上滚筒和向下的方向上滚动到底部的滚筒上，使得图纸的顶部可以被带到底部起草台的一部分，反之亦然，从而允许起草人沿着起草板上下移动图纸，而无需重新调整或调整图纸。

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