Abstract: A media advance system for a printer, the system comprising: a drive roller for advancing the print medium, said drive roller being mounted on a first spindle, a second rotary element mounted on a second spindle for applying tension to the print medium downstream of said drive roller, a drive motor operatively connected to said first spindle, and a second motor operatively connected to said second spindle, wherein the velocity of the drive motor is constantly adjustable and the velocity of the second motor is constantly adjustable to the instantaneous velocity of the drive motor.

Abstract: An athletic training apparatus to train a player with or without a coach is disclosed. The machine includes a collapsible frame, a striking structure, a coaching cage, and one moveable member. The collapsible frame provides a height adjustment mechanism to allow partial collapsibility of the frame during storage or movement. The striking structure couples detachably to the collapsible frame. A player or coach selects the striking structure in accordance with desired goals of an athletic training session. The coaching cage is incorporated within the collapsible frame. The coaching cage assists the coach to in real-time provide an unobstructed view of a player's body position and player motion; thereby, coach's real-time observations and feedback train a player's movements to achieve a hit to a defined target or objective. A movable member transports the collapsible frame between a first location and a second location with minimal disassembly.

Abstract: A measurement method for roll media comprises determining media thickness as a function of a relationship between media advance and media roll rotation.