A liquid ejecting apparatus includes an ejecting unit that is capable of ejecting a liquid; and a tension adjusting unit that is rotatable about a rotational shaft and that is capable of applying a tension to a medium by coming into contact with the medium onto which the liquid is ejected. The tension adjusting unit is capable of applying the tension to the medium at a balancing position at which the tension adjusting unit is balanced by a weight of the tension adjusting unit.

Device and method for controlling axial forces acting upon a moving web comprises first, second and third rotatable rollers. The third roller is between the first and second rollers and is movable in a circular path in the vertical plane between lower and upper positions in response to axial forces acting at any moment upon the web. To enable a simple manual installation of the web, the upper position of the third roller is at a sufficient vertical distance above the first and second rollers to form an open horizontal passage through which the web can pass freely between the first and second rollers and the above-situated third roller. Axial forces are controlled by biasing the third roller with a force which counters the motion of the third roller in the direction of the upper working position and which is less than the ultimate tensile strength of the web.

Device and method for controlling axial forces acting upon a moving web comprises first, second and third rotatable rollers. The third roller is between the first and second rollers and is movable in a circular path in the vertical plane between lower and upper positions in response to axial forces acting at any moment upon the web. To enable a simple manual installation of the web, the upper position of the third roller is at a sufficient vertical distance above the first and second rollers to form an open horizontal passage through which the web can pass freely between the first and second rollers and the above-situated third roller. Axial forces are controlled by biasing the third roller with a force which counters the motion of the third roller in the direction of the upper working position and which is less than the ultimate tensile strength of the web.

A printing apparatus includes: a ribbon supply roll; a thermal head that heats an ink ribbon fed out from the ribbon supply roll and thereby transfers an ink onto an image receiving body; a ribbon take-up roll that takes up the ink ribbon after transfer of the ink; a supply side guide member disposed to be displaced in a direction orthogonal to an axial direction, so as to changeably apply tension to the ink ribbon by biasing force of a supply side spring member; and a take-up side guide member disposed to be displaced in a direction orthogonal to an axial direction, so as to changeably apply tension to the ink ribbon by biasing force of a take-up side spring member. A spring constant of the supply side spring member is different from a spring constant of the take-up side spring member.

A printing apparatus includes: a ribbon supply roll; a thermal head that heats an ink ribbon fed out from the ribbon supply roll and thereby transfers an ink onto an image receiving body; a ribbon take-up roll that takes up the ink ribbon after transfer of the ink; a supply side guide member disposed to be displaced in a direction orthogonal to an axial direction, so as to changeably apply tension to the ink ribbon by biasing force of a supply side spring member; and a take-up side guide member disposed to be displaced in a direction orthogonal to an axial direction, so as to changeably apply tension to the ink ribbon by biasing force of a take-up side spring member. A spring constant of the supply side spring member is different from a spring constant of the take-up side spring member.

A printer equipped with a storage portion capable of storing front-wound continuous paper with a printing surface on a front side and back-wound continuous paper with a printing surface on a back side, the printer including a main body, a cover capable of being opened and closed relative to the main body, a print head that prints on the printing surfaces of the front-wound continuous paper and the back-wound continuous paper pulled out from the storage portion, a damper for back-wound continuous paper provided in the main body and capable of being urged in a direction abutting on a non-printing surface of the back-wound continuous paper pulled out from the storage portion, and a damper for front-wound continuous paper provided on the cover and capable of being urged in a direction abutting on the printing surface of the front-wound continuous paper pulled out from the storage portion.

A printer equipped with a storage portion capable of storing front-wound continuous paper with a printing surface on a front side and back-wound continuous paper with a printing surface on a back side, the printer including a main body, a cover capable of being opened and closed relative to the main body, a print head that prints on the printing surfaces of the front-wound continuous paper and the back-wound continuous paper pulled out from the storage portion, a damper for back-wound continuous paper provided in the main body and capable of being urged in a direction abutting on a non-printing surface of the back-wound continuous paper pulled out from the storage portion, and a damper for front-wound continuous paper provided on the cover and capable of being urged in a direction abutting on the printing surface of the front-wound continuous paper pulled out from the storage portion.

A printing apparatus includes: a feeding shaft configured to support a roll body; a printing section configured to perform printing on a medium fed from the feeding shaft; a tension applying unit configured to come into contact with the medium after the medium is fed out from the feeding shaft and before the medium reaches the printing section, thereby applying tension to the medium; and a control unit, in which the tension applying unit includes: a tension bar configured to come into contact with the medium; an arm configured to support the tension bar and rotate to displace the tension bar; an encoder configured to detect a rotational angle of the arm; and a stopper configured to come into contact with the tension bar or the arm to restrict movement of the tension bar and the arm, and the control unit sets, as a reference angle of the arm, a rotational angle of the arm detected by the encoder in a state in which the tension bar or the arm is in contact with the stopper.

A medium supply apparatus supplying a rolled medium includes a tension member contacts to the medium to apply a tension to the medium, a state switching part that switches states of the tension member between first and second states, and a control unit. The tension member is swingable between a first position at which a first corner angle (1) and a second position at which a second corner angle (2) is formed, the second corner angle (2) being greater than the first corner angle (1). The control unit causes the state switching part to switch the state of the tension member to the fixed state in the first position when the medium is supplied, the control unit causes the state switching part to switch the state of the tension member to the releasing state in the first position when the control unit does not receive an image forming start signal for a predetermined period, and the control unit causes the state switching part to switch the state of the tension member to the fixed state when the tension member reaches the second position.

A printing apparatus includes a transport unit which includes a transport roller pair which transports a medium in a transport direction, a printing unit which prints onto the medium, a winding unit which winds the printed medium, and a tension application unit which applies a tension to the medium at a position between the transport roller pair and the winding unit. The tension application unit includes a pair of arms which are capable of rotating. A tension bar is supported on one end of the arms and comes into contact with the medium. The bar is rotated from an upper limit position to a lower limit position by transportation of the transport unit being performed two or more times.