公开(公告)号：CA1097802A

公开(公告)日：1981-03-17

申请号：CA291156

申请日：1977-11-17

Applicant: XEROX CORP

Inventor： FREY THOMAS M

IPC: G05D13/62 ,  G03G19/00 ,  G11B15/467 ,  G11B27/10 ,  G11B5/52

Abstract: CONTROLLED-WIDTH-SYNCHRONIZATION OF MAGNETICALLY RECORDED PIXELS Synchronization of pixels in tracks of magnetically recorded information is provided by insuring that pixels are of substantially uniform width, particularly the first recorded pixel in each recorded track. Uniform width of pixels, particularly first pixels, is achieved through a triggering circuit which begins recording the first pixel of each track only when the record head is at the proper location. The circuit is capable of delaying the recording of a track to within a pixel length of time and divides the pixel length of time to some predetermined plurality of track recording starting points.

公开(公告)号：GB2149355B

公开(公告)日：1988-05-11

申请号：GB8429414

申请日：1984-11-21

Applicant: XEROX CORP

Inventor： FREY THOMAS M ,  KOVNAT LARRY A

IPC: B41J2/42 ,  G03G19/00 ,  G03G21/14 ,  H04N1/00 ,  H04N1/04 ,  H04N1/207 ,  H04N1/21 ,  H04N1/27 ,  B41J3/15

Abstract: Magnetographic copier having a movable carriage on which the process stations for recording, developing, transferring and cleaning are mounted. A ribbon of magnetic tape is threaded through the process stations and is held stationary during the image processing, so that the movement of the carriage causes the tape to pass all of the process stations. A CCD array scans segments of a fixed original document and then returns to a start of scan position where it is stepped. The carriage and CCD array are concurrently stepped a distance substantially equal to width of a segment prior to the next scan. The CCD array and carriage are connected by cable and move concurrently. The elements of the CCD array are connected in a one-to-one manner with elements of a magnetic recording head at the recording station. Start of scan is initiated by sensing accurately placed holes in the magnetic tape and width of scan is controlled by marks on a code strip which are detected by the CCD array elements to adjust the number of elements enabled.

公开(公告)号：GB2149355A

公开(公告)日：1985-06-12

申请号：GB8429414

申请日：1984-11-21

Applicant: XEROX CORP

Inventor： FREY THOMAS M ,  KOVNAT LARRY A

IPC: B41J2/42 ,  G03G19/00 ,  G03G21/14 ,  H04N1/00 ,  H04N1/04 ,  H04N1/207 ,  H04N1/21 ,  H04N1/27 ,  B41J3/15

Abstract: Magnetographic copier having a movable carriage on which the process stations for recording, developing, transferring and cleaning are mounted. A ribbon of magnetic tape is threaded through the process stations and is held stationary during the image processing, so that the movement of the carriage causes the tape to pass all of the process stations. A CCD array scans segments of a fixed original document and then returns to a start of scan position where it is stepped. The carriage and CCD array are concurrently stepped a distance substantially equal to width of a segment prior to the next scan. The CCD array and carriage are connected by cable and move concurrently. The elements of the CCD array are connected in a one-to-one manner with elements of a magnetic recording head at the recording station. Start of scan is initiated by sensing accurately placed holes in the magnetic tape and width of scan is controlled by marks on a code strip which are detected by the CCD array elements to adjust the number of elements enabled.

公开(公告)号：DE2813240A1

公开(公告)日：1978-10-05

申请号：DE2813240

申请日：1978-03-28

Applicant: XEROX CORP

Inventor： FREY THOMAS M

IPC: G11B5/00 ,  G03G19/00 ,  G11B5/86 ,  G11B25/06 ,  G11B27/10 ,  H04N1/19 ,  H04N1/207 ,  H04N1/21 ,  H04N1/27 ,  G11B11/10

公开(公告)号：CA1127303A

公开(公告)日：1982-07-06

申请号：CA298559

申请日：1978-03-09

Applicant: XEROX CORP

Inventor： FREY THOMAS M

IPC: G11B5/00 ,  G03G19/00 ,  G11B5/86 ,  G11B25/06 ,  G11B27/10 ,  H04N1/19 ,  H04N1/207 ,  H04N1/21 ,  H04N1/27 ,  G06K1/12

Abstract: ELECTRONICALLY CONTROLLED MAGNETIC RECORDING An electronically controlled magnetic recorder for rapidly optically scanning an original document at a distance and for producing a latent magnetic image thereof. An electronic interface between the optical scanner and the magnetic recording head includes optional electronic halftoning circuitry, circuitry for controlling system and subsystem timing; memory circuits; write drivers and circuitry for controlling pixel alignment.

公开(公告)号：CA1082803A

公开(公告)日：1980-07-29

申请号：CA291111

申请日：1977-11-17

Applicant: XEROX CORP

Inventor： FREY THOMAS M ,  POND STEPHEN F

IPC: G03G19/00 ,  G11B5/86 ,  G11B20/06 ,  H04N1/40 ,  G11B21/02

Abstract: CONSTANT WAVELENGTH MAGNETIC RECORDING Constant wavelength magnetic imaging is provided by generating a signal having a frequency proportional to the speed of a rotational recording member, multiplying that frequency up to a higher, desired recording frequency, and phase-locking the higher frequency signal to the unmultiplied lower frequency, thus synchronizing the recording frequency with the motor speed.

公开(公告)号：DE2751555A1

公开(公告)日：1978-10-19

申请号：DE2751555

申请日：1977-11-18

Applicant: XEROX CORP

Inventor： FREY THOMAS M

IPC: G03G19/00 ,  H04N1/27 ,  H04N1/28

Abstract: A variable speed, fixed wavelength magnetic imaging system is provided by generating a signal having a frequency proportional to the speed of a rotational recording member and using that signal to provide a recording frequency of fixed wavelength.