Patent ID: 7168872

Claim:
A printer paper spooler with error condition detector comprising: a first slot structure defining a first slot cavity and a second slot structure defining a second slot cavity; a bobbin disposed between said first slot structure and said second slot structure, wherein said bobbin includes a first extension that is configured to be associable with said first slot cavity and a second extension that is configured to be associable with said second slot cavity; a light emitting diode disposed on said first slot structure; a phototransistor disposed on said second slot structure and positioned to selectively receive a detecting light beam emitted by said light emitting diode; a take-up reel disposed on a take-up tower and powered by a take-up motor, wherein said take-up reel is associable with said bobbin via printed receipt paper supplied by a receipt paper roll; a base structure, including a base parallel port, on which said first slot structure, said second slot structure, and said take-up tower are disposed; and a spooler control program, associable via a data exchange connection with said phototransistor, said take-up motor, and a printer control program, wherein said printer control program is associated with a receipt paper printer that is printing said printed receipt paper supplied by said receipt paper roll, and wherein said printer control program controls operation of said receipt paper printer.