Recording drum arrangement

Details Recording drum arrangement Recording drum arrangement

1999-12-08

2001-03-20

Pendegrass, Joan (Department: 2852)

Incremental printing of symbolic information

Electric marking apparatus or processes

Electrostatic

C347S262000, C355S072000, C358S302000

Reexamination Certificate

active

06204871

ABSTRACT:

FIELD OF THE INVENTION
The invention relates to a device for the recording of image information on a planar recording medium. In particular, the invention relates to a device for the production of pictures by printing or by projecting image information onto a photographic recording material.
BACKGROUND ART
Recording drum devices generally include a rotating clamping drum for the recording medium and a recording unit which is stationary relative to the rotation movement of the clamping drum, which unit consists of one or more recording heads which are displaceable parallel to the axis of one or more recording head fields which extend essentially parallel to the axis of rotation of the clamping drum. The recording of image information is carried out point by point, whereby the whole surface of the recording material mounted on the clamping drum is passed over on the one hand by rotation of the clamping drum and on the other hand by displacement parallel to the clamping drum axis of the recording heads or the recording head fields extending across the width of the clamping drum. Recording drum devices of this type are used, for example, for photographic recording processes by way of, for example, light diode exposure of photosensitive copier material or film, and for electrostatic printing processes, as well as for ink jet printing processes.
In the previously known recording drum devices of this type, the recording medium depending on the technology either paper or photographic copy material adapted to the intended use—is manually or automatically fed from the outside to the clamping drum and appropriately fixed on the mantle surface thereof. The recording medium must thereby always be cut first to the length corresponding to the drum circumference. If the length of the clamped-on recording material section does not correspond with the length of the image to be recorded or the total length of the images to be recorded, measured in circumferential direction of the clamping drum, cuttings and, thus, waste result.
SUMMARY OF THE INVENTION
This disadvantage is now to be overcome by the present invention and a drum recording arrangement of the generic type is to be further improved accordingly such that clippings-derived waste is avoided. Moreover, the automatic feeding of the recording medium into the clamping drum is to be simplified.
According to the principle idea of the invention, the recording medium is fed from the inside of the clamping drum onto its mantle and fastened thereon. This on the one hand results in an especially simple and advantageous construction and allows on the other hand the cutting of the recording medium to the respectively required exact length after the recording of the image information, without generating clippings. The image format can thereby be arbitrarily varied within the available length of the clamping drum circumference, which permits a very flexible and economical operation of the recording device. Of course, several pictures can also be recorded thereby in one step, as long as their total length does not exceed the circumference of the clamping drum. The physical separation of the recorded pictures into individual pictures can thereby take place even on the clamping drum itself (after completed recording) or in a separate operating step.
The recording arrangement in accordance with the invention is especially suited for use in photographic printers, as well as minilabs, and in high performance ink jet printers.


REFERENCES:
patent: 3829208 (1974-08-01), Van Meijel
patent: 4707712 (1987-11-01), Buckley et al.
patent: 5159352 (1992-10-01), Ferla et al.
patent: 5548408 (1996-08-01), Koren
patent: 59-59448 (1984-04-01), None
patent: 63-315270 (1988-12-01), None
patent: 2-120762 (1990-05-01), None

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