Apparatus for the manufacture of a window by detachment of the edges of a sheet of glass along a score

Apparatus for detaching the edges of a glass sheet from a closed pattern having substantially rectilinear portions and a number of corners therebetween whose perimeter is defined by a cut-off line incised in the surface of the glass sheet comprising

• (a) a frame including a plurality of elements circumscribing an open area,
• (b) elastic means including a belt formed by a body portion having a plurality of extensions equal in number to the number of corners of said closed pattern, and at least one elastic strap connecting each extension of said body portion to one of said elements thereby to dispose said elastic means within said open area, and wherein said elastic means is disposed such that only said extensions of said body portion cross said cut-off line within a substantially rectilinear portion to bear on the edges of said glass sheet contiguous to said rectilinear portion,
• (c) means for supporting said glass sheet within the area of said closed pattern, and
• (d) means for moving at least one of said frame and supporting means toward the other whereby during movement said elastic means contacting the edges of said glass sheet exert a force to cause them to flex about and detach from said closed pattern at said cut-off line.