Printer with multi-curved intermediate transportation path

A printer, comprising:

• a first paper transportation path configured to guide a fanfold paper, the first paper transportation path including an intermediate paper transportation path;
• a second paper transportation path configured to guide a roll paper;
• a common transportation path that passes a printing position and has a portion that is common with both a part of the first paper transportation path and a part of the second paper transportation path;
• and
• an attachment for forming the intermediate paper transportation path, the attachment connecting the first paper transportation path with the common transportation path;
• wherein
• the intermediate paper transportation path is located upstream of where the first paper transportation path and the second paper transportation path merge, the intermediate paper transportation path having a multi-curved shape in the paper transportation direction for straightening the fanfold paper;
• and
• the second paper transportation path has a tension guide for adjusting the tension of the roll paper pulled from the roll paper compartment;
• the tension guide is disposed on an access cover for opening and closing the roll paper compartment;
• and
• the attachment is removably attached to the tension guide.

A printer, comprising:

• a first paper transportation path configured to guide a fanfold paper, the first paper transportation path including an intermediate paper transportation path;
• a second paper transportation path configured to guide a roll paper;
• a common transportation path that passes a printing position and has a portion that is common with both a part of the first paper transportation path and a part of the second paper transportation path;
• an attachment for forming the intermediate paper transportation path, the attachment connecting the first paper transportation path with the common transportation path;
• and
• a paper pressure roller at a position opposing the attachment;
• wherein the intermediate paper transportation path is located upstream of where the first paper transportation path and the second paper transportation path merge, the intermediate paper transportation path having a multi-curved shape in the paper transportation direction for straightening the fanfold paper;
• and
• wherein the multi-curved shape is formed by the surface of the attachment opposing the paper pressure roller and the outside surface of the paper pressure roller.

A printer, comprising:

• a first paper transportation path configured to guide a fanfold paper, the first paper transportation path including an intermediate paper transportation path;
• a second paper transportation path configured to guide a roll paper;
• a common transportation path that passes a printing position and has a portion that is common with both a part of the first paper transportation path and a part of the second paper transportation path;
• an attachment for forming the intermediate paper transportation path, the attachment connecting the first paper transportation path with the common transportation path;
• and
• a guide surface that guides the attachment to avoid contact with the paper pressure roller during operation of the printer;
• wherein the intermediate paper transportation path is located upstream of where the first paper transportation path and the second paper transportation path merge, the intermediate paper transportation path having a multi-curved shape in the paper transportation direction for straightening the fanfold paper.