Recorders – Markers and/or driving means therefor – Stylus feature
Patent
1990-09-14
1992-07-14
Fuller, Benjamin R.
Recorders
Markers and/or driving means therefor
Stylus feature
346107R, G01D 1514, G01D 942
Patent
active
051307251
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention refers to an apparatus for integrating an optical character generator into a printer housing.
2. Description of the Related Art
The integration of optical character generators of non-mechanical printers in a corresponding printer housing is always accompanied by adjustments. The necessity for such adjustments is thereby explained based on the fact that the optical images generated by the character generator are projected onto a transfer printing drum through an imaging optics. The typical imaging scale of imaging optics that are employed lies at a ratio of 1:1. Since the imaging optics is preferably integrated fixed in the character generator, the distance of the surface of the imaging optics from the surface of the transfer printing drum must be optimally set so that the imaging quality is not inadmissably deteriorated by transgressing the depth of field of the imaging optics. Assuming that the character generator can be manufactured rather precisely, the setting of this distance, however, is greatly dependent on how exact the distance between the seating point of the character generator in the printer housing and the rotational axis of the transfer printing drum can be set. This setting precision is deteriorated by a statically changing untrue spindle running of the transfer printing drum. Since this untrue spindle running cannot be avoided, the depth of field of the imaging optics constantly varies within a certain range of tolerances. So that the quality losses are not further increased when imaging the optical images onto the surface of the transfer printing drum, the distance between the seating point of the character generator in the printer housing and the rotational axis of the transfer printing drum should be kept constant. This, however, the device including proves problematical when the character generator, for example in case of maintenance, is taken out of the printer housing and is then subsequently reintroduced thereinto.
A possibility of avoiding the problem is conceivable in that the distance is again re-adjusted after every integration of the character generator into the printer housing. What is especially disadvantageous given this type of procedure is that an individual adjustment error possibly deriving from constant adjustments will additionally deteriorate the imaging quality.
WO 88/00 739 discloses a fastening and setting mechanism for the exact arrangement of a character generator relative to a light-sensitive surface. What are characteristic of the fastening and setting mechanism are, first, a plurality of fixing or, respectively, locking elements with which a light emission arrangement arranged on a carrier element at both long sides of the character generator is detachably secured at a prescribed spacing from the light-sensitive surface. Over and above this, on the other hand, fastening and adjustment elements are also provided on the carrier element with which an imaging optics of the character generator can be adjusted between the light-sensitive surface and the light emission arrangement for an optimum imaging characteristic, for example resolution and depth of field of the latent electrostatic image on the light-sensitive surface.
SUMMARY OF THE INVENTION
The present invention is therefore based on the object of creating an apparatus of the species initially cited with which the adjustment of an optical character generator after the integration thereof in a printer housing is eliminated.
In an apparatus of the species initially cited, this object is inventively achieved in a device for the integration of the optical character generator, the device including guide rails provided in the printer housing via which guide rails the character generator is guided up to a first fastening element adjustably arranged in the printer housing that serves as a seat for the character generator; the first fastening element comprises a ramp via which the character generator proceeds to its seating position and comprises
REFERENCES:
patent: 4704619 (1987-11-01), Bierhoff et al.
patent: 4954842 (1990-09-01), Hashimoto et al.
Berger Helmut
Schreyer Siegfried
Fuller Benjamin R.
Siemens Aktiengesellschaft
Yockey David
LandOfFree
Apparatus for integrating an optical character generator in a pr does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus for integrating an optical character generator in a pr, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for integrating an optical character generator in a pr will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-337998