Abstract: An imaging forming device using a platen, an upper peel roller, a lower peel roller movably positioned under and parallel to the upper peel roller, a diverter bar rotatably positioned underneath the platen and near the upper and lower peel rollers and adapted to guide a printable medium backing to move between the platen and the upper peel roller to between the upper and lower peel rollers, a peel bar rotatably positioned over the upper peel roller, a pair of lever cams rotatably positioned respectively at opposite ends of the upper and lower peel rollers, the lever cams are adapted to push the lower peel roller to press the printable medium backing against the upper peel roller during operation for moving the printable medium backing through the imaging forming device and to allow the lower peel roller to separate apart from the upper peel roller when the imaging forming device is open for loading the printable medium backing in between the upper and lower rollers.

Abstract: An image forming device includes a roll tensioner adapted to hold a medium roll rotatably mounted thereon for providing a printable medium strip to the imaging device. The roll tensioner comprises a torsion mechanism exerting torsion to the printable medium strip that tends to pull back the printable medium strip and, thus, to prevent slack of the printable medium strip, the roll tensioner further including a torsion control mechanism to prevent the torsion from getting too large to stop the rotation of the printable medium roll, the roll tensioner also including a clutch mechanism to prevent damage to the torsion mechanism.

Abstract: An integrated ribbon mechanism comprises a support frame having a bottom plate and two side plates integrated to the bottom plate at opposite sides, a print head assembly rigidly mounted on the bottom surface of a bottom plate, first and second pivotal holes positioned on opposite side plates of the support frame, and a pair of locators positioned at opposite side ends of the print head assembly, each locator having an extrusion portion positioned within a respective slot of the drive mechanism during operation wherein the extrusion portions are smaller than the slots of the drive mechanism to allow the integrated ribbon mechanism to slide against a drive mechanism, the integrated ribbon mechanism being pivotally and adjustably coupled to the drive mechanism by a pair of pivot pins that are smaller than the first and second pivotal holes to allow the integrated ribbon mechanism to slide against the drive mechanism wherein a ribbon strip mounted on the integrated ribbon mechanism will be pulled by a platen of

Abstract: A medium tracking bar is incorporated into an imaging device for preventing wrinkles or buckling of a medium strip sliding over and touching the medium tracking bar, the medium tracking bar being centrally pivoted to the imaging device by a connecting piece and being centrally pivoted by an elastic element to allow the medium tracking bar to swing like a teeter-totter board in any direction to counteract an uneven stress problem on the medium strip due to a misalignment of the medium strip and to realign the medium strip when it passes through the device thereby to prevent wrinkles or buckling of the medium strip.

Abstract: A printing media roll mounting mechanism including a frame defining a roll compartment for accommodating a printing media roll. First and second roll holders are mounted in the compartment in axial alignment substantially perpendicular to the web path for concurrent oppositely directed linear movement. The first and second roll holders are spring urged toward one another but can be moved apart to receive different width media rolls therebetween. When the first roll holder is moved outwardly, e.g., to the right, against the spring urging, the second roll holder will also move outwardly to the left. The two roll holders are spring urged toward each other to respectively engage opposite ends of a media roll core placed therebetween.