US 6,196,537 B1 · Thickness measurement apparatus

Abstract

An apparatus for measuring the thickness of flat products such as sheets or signatures, the flat products being fed from a pile of signatures to a pocket by a pocket feeder. The pocket feeder includes a first and second roller. The first roller is arranged against the second roller to form a nip therebetween for receiving a flat product. The first roller is deflectable when a flat product enters the nip. The apparatus comprises a first proximity target which is arranged on the first roller and a second proximity target which is fixedly arranged on the receiving unit. A proximity switch monitors the targets and a control unit starts and stops counting the pulses generated by an encoder. To calculate the thickness of a flat product, the counted pulses are compared to a stored value.

Claims10

Dependent claims

An apparatus for measuring the thickness of flat products comprising:

a first and a second roller, the first roller being arranged against the second roller to form a nip therebetween for receiving flat product, wherein the first roller is deflectable when a flat product enters the nip, and wherein the first and second rollers are mounted on a movable transporting device;
a first proximity target arranged on the first roller;
a second proximity target fixedly mounted on said transporting device;
and
at least one proximity switch arranged apart from said movable transporting device for monitoring at least one of the first and second proximity targets.

2 more elements

Dependencies are inferred from the claim text.

Thickness measurement apparatus

Life of this patent

Thickness measurement apparatus

Life of this patent

Abstract

Claims10