Bar coding scheme for sensing media type and quantity on a rotat

Details Bar coding scheme for sensing media type and quantity on a rotat Bar coding scheme for sensing media type and quantity on a rotat

1992-11-13

1993-12-07

Nelms, David C.

Radiant energy

Photocells; circuits and apparatus

Optical or pre-photocell system

235464, G06K 710

Patent

active

052685810

ABSTRACT:
In a pen plotter having plotting media supplied in the form of plotting media supply rolled around a hollow tube, this is a method and apparatus for automatically identifying the type of, and measuring the amount of, plotting media contained on the plotting media supply roll. A circular barcode strip is secured to the inner surface of the supply tube and is optically scanned to reveal the identity of the media contained on the supply roll. Said barcode strip's properties allow for the determination of the rotational velocity of the supply roll which, when used in conjunction with other known and easily derivable pieces of information, also allow for the precise calculation of the amount of media remaining on the roll. Knowing the identity of the media on the roll allows the plotter to handle the media in a manner consistent with its properties. Knowing the quantity of media remaining allows both media low and media out conditions to be determined and alarmed.

REFERENCES:
patent: 3931524 (1976-01-01), Herrin
patent: 4463251 (1984-07-01), Koutonen et al.

Affiliated with

Also associated with

Rating

Bar coding scheme for sensing media type and quantity on a rotat does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Bar coding scheme for sensing media type and quantity on a rotat, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bar coding scheme for sensing media type and quantity on a rotat will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2017685