Method of and system for detecting object weighing interferences

A system, comprising:

• a housing having a horizontal scanning window;
• an imaging-based symbol reading subsystem for capturing images of objects on or above the horizontal scanning window and processing the captured images in an effort to read symbols on objects;
• a weigh scale subsystem comprising a weigh platter above the horizontal scanning window, the weigh scale subsystem for weighing objects placed on the weigh platter and producing weigh data representative of the weight of objects weighed on the weigh platter;
• and
• a weighing interference detection subsystem for projecting pairs of overlapping planar IR-based object detection planes normal to the weigh platter about the outer edges of the weigh platter to detect weighing interference conditions and generating control signals indicative of detected weighing interference conditions.

A method of weighing objects on a weigh platter having outer edges, comprising:

• projecting pairs of overlapping planar IR-based object detection planes normal to the weigh platter about the outer edges of the weigh platter;
• detecting, with the projected pairs of overlapping planar IR-based object detection planes, if one or more objects are extending over an outer edge of the weigh platter;
• weighing an object on the weigh platter;
• and
• if an object extending over an outer edge of the weigh platter is not detected, transmitting the weight of the object;
• if an object extending over an outer edge of the weigh platter is detected, not transmitting the weight of the object.