Title:
IMPROVED METHOD AND SYSTEM FOR DRIVING FACSIMILE TRANSMITTERRRECEIVERS
Document Type and Number:
Japanese Patent JPS5248907
Kind Code:
A
Abstract:
In a facsimile system, rotation of a transmitter drum carrying a document is synchronized with the rotation of a receiver drum carrying a copy medium. Synchronization of the rotating transmitter drum and the rotating receiver drum is assured by driving the transmitter drum from an AC power line and locking the receiver drum to the AC power line frequency once synchronization of the transmitter drum and the receiver drum have been achieved. In order to achieve initial synchronization, the drive for the receiver drum is initially locked to a source of controlled frequency until a predetermined angular position of the receiver drum relative to a predetermined angular position of the transmitter drum is attained. The receiver motor which is of the DC type is controlled in angular frequency after initial synchronization by generating a signal having a frequency phase locked to the AC power line frequency.
Inventors:
JIOON EMU BAANDERINGU
Application Number:
JP12238476A
Publication Date:
April 19, 1977
Filing Date:
October 14, 1976
Export Citation:
Assignee:
EXXON RESEARCH ENGINEERING CO
International Classes:
H04N1/36; (IPC1-7): H04N1/06; H04N1/36