Abstract: A computer peripheral device retention apparatus is disclosed. In one embodiment, the apparatus includes a frame, a control arm slidably coupled to the frame, and first and second locking arms operably coupled to the control arm. A release button is received within the frame and is in operable association with the control arm. A release trigger arm is pivotally attached to the frame and a control arm latch is connected to the control arm at a first end and is releasably coupled to the release trigger arm at a second end. An ejection mechanism is attached to a rear end of the frame. A backplane printed circuit board is also attached to the rear end of the frame and an electrical control system is coupled to the backplane printed circuit board. A solenoid assembly is coupled to the electrical control system and is releasably coupled to the control arm.

Abstract: A printer apparatus has a frame member supporting an endless revolving type band in alignment with a row of print hammers with a gap therebetween. Ribbon spools with ribbon wound thereon are rotatably supported in spool housings at either end and on opposite sides of the frame member. The spool housings each have a receptacle portion and a cover portion which enclose the spool. A gap in the spool houses enables the ribbon to extend between the housing and through the gap. The ink ribbon is guided through the gap in parallel with the row of hammers and at an angle to the print line by a set of guide pins on the cover of one spool housing and a set set of guide pins mounted on the frame member in proximity with the other spool housing. Both sets of guide pins engage the same side of the ink ribbon in a manner whereby touching the ribbon is not required to install or remove the ribbon from the printer apparatus.