Feeder module with thickness detection
US5125642A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 29, 1991 |
| Grant date | Jun 30, 1992 |
| Priority date | — |
| Expiry date | May 29, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H2513/40
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A feeder module for feeding sheet inserts and having a thickness detector for measuring the thickness of inserts comprises: a gripper drum disc for transporting the inserts upon its periphery; a detector caliper assembly including a pivotable arm having a follower roller borne at one end and a magnet mounted at the other end, the arm being spring loaded with the follower roller against the periphery of the gripper drum disc; and, a stationary Hall sensor to measure relative displacement between the sensor and the magnet. As an insert is transported upon the periphery of the gripper drum disc, the insert is interposed between the periphery and the follower roller and the Hall sensor senses the consequent magnet displacement as a measure of the thickness of the insert. In one embodiment, an adjustable anvil having a peripheral surface is mounted on a face of the gripper drum disc. The anvil is pre-adjusted so that its peripheral surface is disposed at a constant radius from the axis of rotation of the disc. In another embodiment, signals provided by the Hall sensor in absence of inserts are stored as reference signals. Signals provided by the Hall sensor in the presence of an insert …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.