초록 ▼

A cartridge (1) for an injection device carries a code represented by a number of bars (2, 3, 4, 5) mainly perpendicular to the axis of the cartridge. The bars (2, 3, 4, 5) are mainly transparent and are each along its whole length provided with an optical grating which diffracts and reflects light

A cartridge (1) for an injection device carries a code represented by a number of bars (2, 3, 4, 5) mainly perpendicular to the axis of the cartridge. The bars (2, 3, 4, 5) are mainly transparent and are each along its whole length provided with an optical grating which diffracts and reflects light impinging the surface carrying the code so that a minor part of this light is reflected from the surface of the bar as a set of light beams of which beams at least one is detected for the indication of the presence of the bar when said bar passes a reading light field. The reflections from the bars may be interpreted as representing "1"s and "0"s in a binary code.

대표청구항 ▼

A cartridge (1) for an injection device carries a code represented by a number of bars (2, 3, 4, 5) mainly perpendicular to the axis of the cartridge. The bars (2, 3, 4, 5) are mainly transparent and are each along its whole length provided with an optical grating which diffracts and reflects light

A cartridge (1) for an injection device carries a code represented by a number of bars (2, 3, 4, 5) mainly perpendicular to the axis of the cartridge. The bars (2, 3, 4, 5) are mainly transparent and are each along its whole length provided with an optical grating which diffracts and reflects light impinging the surface carrying the code so that a minor part of this light is reflected from the surface of the bar as a set of light beams of which beams at least one is detected for the indication of the presence of the bar when said bar passes a reading light field. The reflections from the bars may be interpreted as representing "1"s and "0"s in a binary code. first detection means for detecting positions of respective pairs of timing marks placed at both ends of each of said plurality of rows of said dots, a line running through a center of each pair of tiring marks representing a center of a corresponding row of said data field; and second detection means for detecting the dots representing the code between the timing marks such that a center of a dot located on said corresponding row in said data field is located either on said line or within a predetermined search range relative to said line. 8. The reader as claimed in claim 7, wherein if the dot does not exist at the position with the timing mark as reference, said second detection means searches for the dot in the surroundings of the position. 9. The reader as claimed in claim 7, wherein the dots contain dots for an error detection code, further including error correction means for making an error correction using the error detection code and upon detection of an error, for correcting preferentially an error caused by the dot most shifted from the position with the timing mark as reference. 10. The reader as claimed in claim 7, wherein said second detection means detects a position shift of the dot placed before the dot representing the code and detects the dot representing the code based on the detected position shift.