US 6,648,233 B2 · Code reading method and device for recording material roll

Abstract

A recording sheet roll includes a winding core, about which a continuous recording sheet is wound. An information code is disposed on a surface of the winding core in an arc shape, and includes plural data indicia DM arranged serially. A start indicia SM is disposed between a beginning and end of a train of the plural data indicia DM, and has a size greater than each of the data indicia DM. A code reading device for the recording sheet roll includes a supply roller for rotating the recording sheet roll at a constant peripheral speed in a winding direction of the recording sheet. A reading photo sensor reads the plural data indicia DM and the start indicia SM. A timer at a CPU measures passage time during which plural indicia in the information code pass the reading photo sensor while the recording sheet roll makes one rotation, and thereafter rotates for a predetermined time T1. A system controller checks the passage time of each of the plural indicia to determine one of the plural indicia as the start indicia SM, so as to determine remaining ones of the plural indicia as the data indicia DM to read the information code.

Claims34

Dependent claims

A code reading method for a recording material roll, said recording material roll including a winding core, a recording material wound about said winding core, and an information code disposed on a surface of said winding core in an arc shape, said information code including plural data indicia arranged serially, and a start indicia disposed between beginning and ending ones of said plural data indicia, and having a size greater than each of said data indicia in an arranging direction thereof, said code reading method comprising steps of:

rotating said recording material roll at a constant peripheral speed in a winding direction of said recording material;
while said recording material roll makes one rotation and thereafter rotates for a predetermined time, measuring passage time during which plural indicia in said information code pass said reading sensor;
and
checking said passage time of each of said plural indicia to determine one of said plural indicia as said start indicia, so as to determine remaining ones of said plural indicia as said data indicia to read said information code.

1 more element

A code reading device for a recording material roll, said recording material roll including a winding core, a recording material wound about said winding core, and an information code disposed on a surface of said winding core in an arc shape, said information code including plural data indicia arranged serially, and a start indicia disposed between beginning and ending ones of said plural data indicia, and having a size greater than each of said data indicia in an arranging direction thereof, said code reading device comprising:

a rotating mechanism for rotating said recording material roll at a constant peripheral speed in a winding direction of said recording material;
a reading sensor for reading said plural data indicia and said start indicia;
a timer for measuring passage time during which plural indicia in said information code pass said reading sensor while said recording material roll makes one rotation and thereafter rotates for a predetermined time;
and
a controller for checking said passage time of each of said plural indicia to determine one of said plural indicia as said start indicia, so as to determine remaining ones of said plural indicia as said data indicia to read said information code.

2 more elements

Dependencies are inferred from the claim text.

Code reading method and device for recording material roll

Life of this patent

Code reading method and device for recording material roll

Life of this patent

Abstract

Claims34