Paper-cutting apparatus and paper-holding device of the same

A holding device for use in a sheet-processing apparatus having a bed resting thereon a sheet material to be held, comprising:

• a supporter structure secured onto said bed;
• a hollow rod with two ends supported by said supporter structure to be spaced from said bed;
• a holding plate coupled to said hollow rod for pressing against said sheet material to be held on said bed;
• a sustaining element disposed in said hollow rod for lifting up said holding plate to release said sheet material in response to a first operation working thereon, and pushing down said holding plate to depress said sheet material in response to a second operation working thereon;
• and
• a handle pivotally coupled to said supporter structure and securely connected to said sustaining element, said handle being pivoted to change the orientation of said sustaining element in said hollow rod so as to conduct said first and second operations.

A holding device for use in a sheet-processing apparatus having a bed resting thereon a sheet material to be held, comprising:

• a hollow rail structure disposed above and spaced from said bed;
• a holding plate coupled to said hollow rail structure for pressing against said sheet material resting on said bed so as to facilitate the operation of the sheet-processing apparatus;
• and
• a sustaining element disposed inside said hollow rail structure for sustaining against a first inner surface of said hollow rail structure so as to lift up said holding plate to release said sheet material or sustaining against a second inner surface of said hollow rail structure so as to push down said holding plate to press said sheet material against said bed.