Abstract Apparatus for holding patterns on a lay marker table so that the patterns will be held absolutely flat within an airtight envelope and therefore immobile with respect to the surface of the table so that the patterns may be accurately reproduced on a piece of sensitized copy material, the apparatus including a pair of opposed sheets of self-adhering material overlying the surface of the table, there being a porous spacer member disposed between the sheets and coextensive therewith with the exception of marginal stretches of the material which circumscribe the porous member whereby the sheets may be sealed together along the marginal stretches with the porous member permitting the withdrawal of air from between the sheets to thereby present an airtight enclosure and flatten the patterns between the sheets. The method of holding the article to be reproduced on the surface by use of said apparatus includes the steps of placing a first sheet of material on the surface; positioning the patterns on the first sheet of material; placing a second sheet of material and the porous spacer member over the patterns; sealing the edges of the sheets together by virtue of their self-adhering nature; and withdrawing air from between the sheets whereby to cause the same to flatten the patterns with respect to the surface and thereby immobilize the same against movement.
Apparatus for holding patterns on a surface comprising: a pair of opposed sheets of self-adhering material overlying said surface, the patterns being between the sheets; a porous spacer member disposed between said opposed sheets of material; means sealing the edges of said sheets together whereby to present an airtight enclosure, said means including face-toface engageable marginal stretches on each of said sheets extending beyond said porous member; a rib raised with respect to said surface and positioned to deform one of said sheets angularly to define a pocket for receiving the marginal stretch of the other sheet whereby to insure face-to-face, self-adhering engagement between the marginal stretches of said sheets; and means for withdrawing air from the enclosure to thereby flatten said patterns between said sheets.
Claim 2
Dependent Claim
126 words
Apparatus for holding patterns on a surface comprising: a pair of opposed sheets of self-adhering material overlying said surface, the patterns being between the sheets; a porous spacer member disposed between said opposed sheets of material; means sealing the edges of said sheets together whereby to present an airtight enclosure, said means including face-toface engageable marginal stretches on each of said sheets extending beyond said porous member; a rib raised with respect to said surface and positioned to deform one of said sheets angularly to define a pocket for receiving the marginal stretch of the other sheet whereby to insure face-to-face, self-adhering engagement between the marginal stretches of said sheets; and means for withdrawing air from the enclosure to thereby flatten said patterns between said sheets.
Claim 3
Dependent Claim
195 words
In combination with a lay marker table having a flat sheet of transparent material with a pair of opposed surfaces, one of said surfaces being in contact with a plurality of closely spaced light tubes whereby said tubes support said sheet, the other surface having patterns positioned with respect thereto, apparatus for holding the patterns in a fixed, flat position relative to said other surfaces comprising: a pair of opposed sheets of self-adhering material overlying said other surface, the patterns being positioned between said sheets; a porous spacer member disposed between said opposed sheets of material; means sealing the edges of said opposed sheets together whereby to present an airtight enclosure for said spacer member and said patterns, said means including face-to-face engageable marginal stretches on each of said sheets extending beyond said porous member; a rib raised with respect to said surface and positioned to deform one of said sheets angularly to define a pocket for receiving the marginal stretch of the other sheet whereby to insure face-to-face, self-adhering engagement between the marginal stretches of said sheets; and means for withdrawing air from said enclosure to thereby flatten said patterns between said opposed sheets.
Claim 4
Dependent Claim
195 words
In combination with a lay marker table having a flat sheet of transparent material with a pair of opposed surfaces, one of said surfaces being in contact with a plurality of closely spaced light tubes whereby said tubes support said sheet, the other surface having patterns positioned with respect thereto, apparatus for holding the patterns in a fixed, flat position relative to said other surfaces comprising: a pair of opposed sheets of self-adhering material overlying said other surface, the patterns being positioned between said sheets; a porous spacer member disposed between said opposed sheets of material; means sealing the edges of said opposed sheets together whereby to present an airtight enclosure for said spacer member and said patterns, said means including face-to-face engageable marginal stretches on each of said sheets extending beyond said porous member; a rib raised with respect to said surface and positioned to deform one of said sheets angularly to define a pocket for receiving the marginal stretch of the other sheet whereby to insure face-to-face, self-adhering engagement between the marginal stretches of said sheets; and means for withdrawing air from said enclosure to thereby flatten said patterns between said opposed sheets.