| 摘要 |
<p>A method for producing a glass knife, in which a flat glass plate (51) is divided by breaking along a dividing line (23) scratched on said plate. The plate is placed on two lower supporting pins (9, 10), positioned by the use of means (7, 8) cooperating with the side edge surfaces of the glass plate, and is fixed by means of two upper supporting pins (17, 18) which are made to engage the upper face of said plate. Each pair of supporting pins has a line of symmetry perpendicular to the line of symmetry of the other pair, one line of symmetry coinciding with the dividing plane. Before the glass plate is broken by moving the supporting pins towards one another, the positioning means (7, 8) are, at least partially, disengaged from the glass plate, such that essentially only the forces deriving from the supporting pins act upon the glass plate during the breaking thereof.</p> |
