Printing system

A printing system comprising:

• a first printer apparatus for forming an image on a first plane of a web having no feed holes;
• and
• a second printer apparatus provided at a post stage of the first printer apparatus for forming an image on a second plane of said web;
• wherein at least the first printer apparatus has mark formation means for forming a position alignment mark at a predesignated position on each page of said web;
• wherein at least the second printer apparatus has mark detection means for detecting said position alignment mark and control means for generating a web feed control signal once per preset period and for causing the generation timing of said web feed control signal to be identical in phase with the generation timing of a mark detection signal as issued from said mark detection means through detection of said position alignment mark;
• wherein said first printer apparatus includes a first imaging apparatus for forming the image on the first plane of said web, and said second printer apparatus includes a second imaging apparatus which is separate from the first imaging apparatus of said first printer apparatus for forming the image on the second plane of said web;
• and
• wherein at least the first printer apparatus includes photographic fixing means for adding at least heat to said web presently holding said image to thereby photographically fix said image on said web.