Conveyance apparatus for a continuous form printed by a printing machine

Conveyance apparatus for a continuous form provided in a printing system including a printing machine having printing means and an after-treatment machine comprising:

• constant-speed conveyance means for feeding the continuous form to the printing means at a constant speed;
• a pair of ejection rollers located downstream of said constant-speed conveyance means for conveying and ejecting the continuous form, under tension, said ejection rollers having driving means and a peripheral speed higher than a peripheral speed of said constant-speed conveyance means;
• a pair of drawing rollers positioned at an entrance to the after-treatment machine for pulling therein the continuous form injected by the printing machine;
• end detecting means for outputting an end signal when a disengagement of the continuous form from said constant-speed conveyance means is detected;
• and
• control means for interrupting a power supply to said driving means for the ejection rollers when said end signal is received from said end detecting means, and when a predetermined period of time, which is shorter than a time for the end of the continuous form to move from the constant-speed conveyance means to the ejection rollers, has passed.

Conveyance apparatus for a continuous form provided in a printing system including a printing machine having a printing means and an after-treatment machine comprising:

• a constant-speed conveyance means for feeding a continuous form to the printing means with a constant speed;
• a pair of ejection rollers located downstream of the constant-speed conveyance means for conveying and ejecting the continuous form, under tension, said ejection rollers having a peripheral speed higher than a peripheral speed of said constant-speed conveyance means;
• a pair of drawing rollers positioned at an entrance to the after-treatment machine for pulling therein the continuous form ejected by the printing machine;
• end detecting means for outputting an end signal when a disengagement of the continuous form from the constant-speed conveyance means is detected, said peripheral speed of said ejection rollers becoming increased when said disengagement occurs;
• and
• control means for increasing a rotational speed of the drawing rollers until said rotational speed of said drawing rollers becomes at least equivalent to said increased speed of the ejection rollers when the end signal is received from the end detecting means.

A conveyance apparatus for a continuous flexible sheet, said conveyance apparatus being provided in a first operating apparatus and in a successive second operating apparatus, comprising:

• means for feeding a continuous sheet at a first feeding speed within said first operating apparatus;
• a first pair of rollers, located downstream of said means for feeding and rotating at a peripheral second speed higher than said first feeding speed of said means for feeding, the continuous sheet being given a tension by said first pair of rollers, the first pair of rollers feeding the continuous sheet at the second feeding speed after a trailing edge of the continuous sheet becomes disengaged from the feeding means;
• a second pair of rollers, positioned at an entrance portion of said second operating apparatus, for pulling the continuous sheet fed by said first pair of rollers into said second operating apparatus;
• means for detecting a disengagement of the trailing edge of the continuous sheet from the feeding means, said means for detecting outputting an end signal in accordance with detecting of said disengagement;
• and
• control means, for receiving and responding to the end signal output from said means for detecting, said control means controlling the peripheral speed of said first pair of rollers to rotate at a third feeding speed lower than said second feeding speed.