| 摘要 |
An edge locating device is particularly useful in a system having an articulating frame for supporting and aligning a first sheet of material relative to a second sheet of material supported on a belt below. The device is attachable to the articulating frame and has an edge contact element for locating the edge of the first sheet and a radiation source and detector for locating the edge of the second sheet. The edge contact element, source and detector are fixed with respect to one another and movable between a first position wherein the element is spaced from the edge of the first sheet and a second position wherein the element contacts the edge of the first sheet. When moved to the second position the source and detector can be used to move the articulating frame until the edge of the second sheet is located.
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