CLAMP AND FILM STRETCHER USING THE CLAMP

摘要

A film stretcher (100) utilizes a spring bias to clamp the film. The film stretcher may include a stretch head having one or more clamps (144) position about the film in locations necessary to clamp the film for stretching in on or more axes. The clamp may utilize a spring (1) to provide the clamping force. The stretch head may include structures (5, 7, 9) that operate to counter the spring bias to move the clamp to one state and then to allow the spring bias to move the clamp to another state. Thus, the stretch head may effectively clamp and unclamp the film.