Coating processes – Electrical product produced – Cellulosic or fibrous base
Patent
1985-01-30
1986-08-19
Goldberg, E. A.
Coating processes
Electrical product produced
Cellulosic or fibrous base
3461351, 427123, 427190, 427250, 427404, 4274198, 428323, 428326, 428327, 428328, 428913, 430195, 430495, 430523, 430524, 430526, 430902, 430935, 430961, B05D 512, B32B 516, G03C 176, G01D 1534
Patent
active
046069372
DESCRIPTION:
BRIEF SUMMARY
STATE OF THE ART
The invention is based on a recording device in accordance with the type of the main claim. Such a recording device is known from DE-OS 30 17 450, for example, whereby aluminum is applied as a metal coating to a tape like support. The metal coating is provided with a lubricant coating on its surface for reducing the scratching traces and grinding traces, whereby the lubricant may consist of a metal soap, among others. The lubricant coating is applied on the metal coating as a further coating after finishing the actual recording support made of a support consisting of a contrast coating and the metallisation which is applied to the surface of the metal coating as a further coating. This type of manufacturing requires an additional operating step for applying the lubricant coating, on the one hand, while this lubricant may cause a contamination of the recording electrode and the mass contact of the recording device during the recording process, on the other hand, which may result in a clear impairment of the recording quality as well as in undesirable burn offs on the mass contact.
Furthermore, a process for generating a lubricant coating on a recording device which is coated with aluminum on the surface of a recording support is described in DE-OS 30 40 485, whereby an additive of one or a plurality of fatty acids is admixed to a coating of the rear side of the support with one or a plurality of nitro lacquer coatings which react with the aluminum layer during an extended aging process and partially transfers it into an aluminum soap, after the recording support is wound into a roll. This process is very expensive, on the one hand, and can be used only in conjunction with lacquering the rear side of the recording support, on the other hand, a similar coating is obtained as described before when applying a lubricant to the surface of the metal coating which does not have the desired characteristics in a sufficient manner.
ADVANTAGES OF THE INVENTION
The recording support for recording devices with the characterizing features of the main claim is advantageous with respect to the described state of the art in that the desired effect of the grinding and scratching trace reduction is obtained without any additional operating step when making the recording support and with a higher degree of efficiency. The lubricant used may be added to the substance constituting the contrast coating when making the recording support, whereby as a contrast substance lacquer and printing inks are particularly suitable. The relatively easily liquefiable ethyl acetate is contained as a solvent in lacquer in a predominant manner, while a more slower drying process is desired in the printing inks, so that butyl acetate is used in an increased manner as a solvent. Printing inks, in particular printing inks which are usable for photo-gravure printing are usually more rich in filler material than lacquer, however basic differences between the two customarily used contrast substances do not exist
The increase of the grinding and scratching tracer resistancy in accordance with the recording support in accordance with the invention is obtained by embedding the lubricant into the evaporated metal layer by means of a diffusion process. The danger of contamination of the recording electrode and the mass contact is substantially reduced since only low amounts of the lubricant is available on the surface of the metal coating. However, these low amounts suffice for obtaining the desired required slide and separating effect on the surface of the metal layer, whereby tests have shown that the wear of the electrodes is also substantially reduced. Furthermore, the lubricant which is present in the contrast coating becomes chemically effective during the burn off process and prevents or reduces the formation of combustion ewsidues on the recording electrodes in view of the chemical reactions, which also result in impairing the recording quality on account of the sharp edged tips which result in mechanical grinding and scratching
REFERENCES:
patent: 4339758 (1982-07-01), Bhatia et al.
patent: 4359484 (1982-12-01), Bahr et al.
patent: 4403224 (1983-09-01), Wirnowski
patent: 4423132 (1983-12-01), Kondo et al.
patent: 4438170 (1984-03-01), McCue
patent: 4483902 (1984-11-01), Bahr et al.
Rossler Manfred
Stiltz Hermann
Winter Gerhard
Goldberg E. A.
Preston Gerald E.
Robert & Bosch GmbH
Striker Michael J.
LandOfFree
Electroerosion recording medium fabrication method does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Electroerosion recording medium fabrication method, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electroerosion recording medium fabrication method will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-393478