| 摘要 |
A clamp may have an outer base member with an inner ramp surface and an inner clamping member with an outer ramp surface abutting the inner ramp surface of the base member. The inner clamping member may have an inner clamping surface for engaging an element to be clamped, such as a film. The inner and outer ramp surfaces are configured such that, with said clamping member backstopped, compression of the base member toward the film forces the clamping member to slide along said inner ramp surface of the base member. The result is that the film is tugged by the clamp. This tugging force may be used to stretch the film.
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