The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 01, 1995
Filed:
Mar. 18, 1993
Jean-Pierre Meur, La Ville Du Bois, FR;
Bernard Vermesse, L'Hay les Roses, FR;
Societe Anonyme Dite: Neopost Industrie, Bagneux, FR;
Abstract
A connection device without electrical contact for connecting a fixed part of a franking machine to a rotary print drum containing electronic circuits includes a transformer separable into two parts respectively fastened to the fixed part and to the rotary printing drum. A first modulator chops and modulates a DC current supplied to a first winding in sympathy with a first signal to be transmitted to the rotary drum. A rectifier and filter device supplies power to the electronic circuits in the rotary drum. A first demodulator demodulates the current induced in the second winding. A second modulator modulates the current induced in the second winding at a different frequency to that used by the first modulator and in sympathy with a second signal to be transmitted to the fixed part. A second demodulator extracts the second signal from the current in the first winding.