Device for detecting the presence of a hard object in an item of

Details Device for detecting the presence of a hard object in an item of Device for detecting the presence of a hard object in an item of

1996-01-11

1997-06-10

Dombroske, George M.

Measuring and testing

Inspecting

7386391, G01M 1900

Patent

active

056378114

ABSTRACT:
The device comprises a conveyor (1) for displacing the envelope, in a displacement direction (D), along a path including a bend, and a member (12) disposed on the outside of the bend and downstream therefrom in said displacement direction, said member (12) cooperating with the conveyor (1) to cause the envelope to curve around the bend, and being movably mounted relative to the conveyor, so as to move a certain distance away from the conveyor depending on the thickness of the envelope and on its stiffness. A sensor (30) is provided to detect said certain distance minus the thickness of the envelope exceeding a predetermined threshold, thereby detecting that a hard object is present inside the envelope. The present invention applies to the processing of mail items.

REFERENCES:
patent: 4063283 (1977-12-01), Rider et al.
patent: 4360108 (1982-11-01), Logothetis
patent: 4361029 (1982-11-01), Platter
patent: 4516264 (1985-05-01), Covari et al.
patent: 4576287 (1986-03-01), Bingham et al.
patent: 4687106 (1987-08-01), Prins

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