| 摘要 |
A conveying system, which is used for conveying a large and light film, includes a film supplying mechanism consisting of a main body, and two cam rollers; the main body has a film inlet, and a film outlet, and all air has to be drawn outside it when the mechanism is used; each cam roller has protruding portions spaced apart and lengthways extending along an outer side, and concave portions between the protruding portions; the cam rollers are positioned side by side near the film outlet, and define a conjugate curve between them; the cam rollers can touch each other closely to prevent air from traveling into the main body while rotating to move a film along that is sandwiched between them, thus preventing negative pressure of the main body from disappearing.
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