Copy magnification change apparatus in magnetic copying machine

Details Copy magnification change apparatus in magnetic copying machine Copy magnification change apparatus in magnetic copying machine

1980-03-25

1982-12-21

Cardillo, Jr., Raymond F.

Facsimile and static presentation processing

Facsimile

Recording apparatus

346 742, 358287, 358288, H04N 128, G03G 1900

Patent

active

043652760

ABSTRACT:
In a magnetic copying machine, a reflected light from an original copy is converted into an electrical signal, and supplied to a magnetic recording head to form a magnetic latent image on a magnetic recording drum. The magnetic latent image is developed by a magnetic toner, and the toner picture is transferred onto a recording paper. The transferred toner picture is fixed on the recording paper, and the remaining toner on the surface of the magnetic recording drum is cleaned after the transfer operation. When the copy magnification factor is larger than one, the pulse interval of clock pulses generated in synchronization with the rotation of the magnetic recording drum for reading out the electrical signal is made longer than that used with actual-size copying, and the movement of the magnetic recording head in the axial direction of the magnetic recording drum per one revolution of the magnetic recording drum is made larger than that used with actual-size copying. When the copy magnification factor is smaller than one, the pulse interval of clock pulses generated in synchronization with the rotation of the magnetic recording drum for reading out the electrical signal is made shorter than that used with actual-size copying, and the movement of the magnetic recording head in the axial direction of the magnetic recording drum per one revolution of the magnetic recording drum is made shorter than that in the actual-size copy.

REFERENCES:
patent: 4268872 (1981-05-01), Kokaji et al.

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