Bar-coded card with coding and reading system

申请公布号：

US5484998(A)

申请号：

US19940213635

申请日期：

1994.03.16

申请公布日期：

1996.01.16

申请人：

DECORA INDUSTRIES, INC.

发明人：

BEJNAR, JAN W.;LIEBMAN, THEODORE E.;LEVITT, ROBERT H.

分类号：

G06K7/14;G06K19/06;(IPC1-7):G06K19/06

主分类号：

G06K7/14

摘要：

A bar-coding system employs a unique bar code pattern which includes a code represented by a series of dark and light stripes that may be easily decoded by a very inexpensive reader with greater reliability. The bar-coding system generates binary data from the pattern which may be described in parts as follows: long light fields at each left and right end; a start bar at each end; right and left data fields; and a three-bit asymmetric pattern (light, dark, light) in the center that indicates the direction in which the pattern is moving past the read head. The coding sequence of the data fields is arranged from either end toward the middle of the pattern where the coding method reverses; therefore, a coupon or card passed through the reader in either direction will yield the same output. Only two widths of the light and dark stripes are used, and the stripes are read as pairs in succession. A reader includes a card slot which is shaped to an arcuate path which bends an inserted card made from a resilient material so that the card is pressed against the slot sidewall to enhance the reader's accuracy and reliability.