Adhesive bonding and miscellaneous chemical manufacture – Differential fluid etching apparatus – With microwave gas energizing means
Patent
1985-10-16
1986-11-25
Powell, William A.
Adhesive bonding and miscellaneous chemical manufacture
Differential fluid etching apparatus
With microwave gas energizing means
65 31, 156637, 156654, 156663, B44C 122, C03C 1500, C03C 2506
Patent
active
046247297
ABSTRACT:
A machine is described that enables to perform continuous etching, according to previously chosen patterns, on a face of glass sheets, in particular of big size. This machine having a high productivity per hour, substantially comprises a roller conveyor formed of a plurality of parallel rollers, all of them having the same diameter, and being driven for feeding forward glass sheets with one face lying on the plane surface defined by the upper generating lines of the rollers, tangentially thereto. The rollers not only feed forward the glass sheet with a controlled speed, but also wet the sheet surface to be etched in an even manner, as they are provided with a spongy outer surface being continuously steeped, during the rotation, in an acid solution which is contained in a lower reservoir and then is transferred by contact to the lower face of the sheet. A chain drive system ensures a uniform speed of all the rollers in function of a selected time of contact provided for each glass sheet with the rollers soaked of acid. There are also provided means for settling the liquid and means for maintaining the acid volume, as well as sucking means for the removal from the environment of vapors generated during the etching.
REFERENCES:
patent: 3284181 (1966-11-01), Harrell et al.
patent: 3294603 (1966-12-01), Myers
patent: 4427488 (1984-01-01), Servais et al.
Bresciani Ferruccio
Santambrogio Pietro
Powell William A.
Vitreal Specchi S.p.A.
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