US928923A - Etching-machine. - Google Patents

Description

B. ALBERT.

ETGHING MACHINE.

APPLIGATION FILED Nov. 29, 19o?.

Patented July 27, 1909.

illllilrlrllf unnnan nuuuunuv EUGEN `ALBERT, 0F MUNI'CH, GERMANY.

E'rcmNG-MAOHINE.

Specication of Letters Patent.

Patented July 27, 1909.

Application ledNovember 29, 1907. Serial No. 404,380.

To all whom it my concern:

Be it known that I, EUGEN ALBERT, a subject of the Emperor of Germany, residing at Schwabingerlandstrasse 55, in Munich, Germany, have invented certain new and useful Improvements in Etching-Machines, of which the following is a specification.

`Myinvention relates to improvements in,

apparatus for etching plates.

v The primary object of my improvement is to provide an eii'ective and expeditious etching machine.

Another object is to construct a machine which causes a maximum number of the atoms of the etching liquid to come into contact with the surface of the plate in a short time; and a further object is to enable the plate to ble readily inspected during the progress of the work.

rlhese and other objects I attain by the novelconstruction and arrangement of parts illustrated in the accompanying drawings, in whichz- Figure' 1, is a side elevation showing the complete machine. sectional View of the operative lparts'of the machine. Fig. 3, is a plan view of the top of the apparatus. Fig. et, is an end elevation of a stirring device with recessed ribs.v Fig. 5, shows the ends of the ribs in plan, and Fig. 6. shows in plan View .another form of stirring device.

A is a stand upon which the etchin bath 1s mounted; 1t may conveniently inc ose a motor such as B ior the driving of the machine, and it is provided with set screws C Cv by which the level of the liquid in the bath` maybe adjusted to the horizontal. i

Upon the top of the stand A two channel irons D are fixed and the bath E is mounted to reciprocate thereon on the rollers e, c. The shaft f carrying the pulley Wheel F is also supported in bearings on the channel irons l), and midway between the channel irons operates by the worm G the Worm wheel H which slowly reciprocates the' connecting rod I carrying the pin z' which connects to the lug /L on the bath E, the bath E is thus caused to move slowly backward and forward. Upon the top of the bath a cover J is hinged at j; it is open in its middle portion and its sides are furnished With an iron' track L upon which run the rollers Z carried Fig. 2, is a longitudinal at the ends of the cross bars M which are attached to ribs m on lthe back of the stirring device N; the stirrer N is provided with projecting ribs n, which vdip into the etching liquid O. The end roller pivot Z s extended outward on each side of the bath and is reciprocated through the medium of connecting rods P; motion is givenV to the connecting rods? by cranks p, on the shaft g which is rotated in turn by a chain R connecting sprocket wheelsS and T .0n the said shaft g and the driving shaft f respectively, The plate X to be etched is laid upon a wooden bed 'U which is provided with side pieces V, recesses W' being made in the sides of the hath for their accommodation and in order that the bed U shall he kept at the bottom of the bath when the stirrer is working projections on the cover press down the side pieces V. By quickly reciprocating the stirrer N and slowly reciprocating the bath itself a vsuccession of small movements is imparted to` the etching liquid O over the surface 0f the plate 'X and the etching rapidly accomplished; a foam producing substance such as Radin: Q-uilay'a Saponawia may be added to the liquid to effect better cleaning of the recesses in the plate and solid particles may he int-roduced into the liquid to eiect removal of the oxid b v mechanical rubbing against the surfaces. ln order that the progress of the Work may he examined, as soon as the cover J is raised the wooden hed U is released and lioatsto the top of the liquid carrying the plate X with it. Hooks K are provided which catching into the recesses hold the cover open during examination or for other voperations to the bath.

An ice tank and a jacket may be formed in connection with the bath for the purpose It will be understood that the machine may be driven either by hand, or by power I claim as my invention 1. In an etchin machine, a bath containing etching liqui a stirring device having rigid projections thereon mounted so that the 'ends of the projections can reciprocate clear l rapid reciprocating movement to the stirring device, a oatin bed as a support for the plate to be etc ed, side pieces connected thereto located in recesses in the sides of the bath, a cover to the bath, and projections on the cover of the bath coperatin With the side pieces to sink the floating be when the cover is closed, substantially as described.

' 3. In an etching machine, a bath containing etching liquid a stirring device having ribs or prongs thereon mounted so that the ends of the ribs or prongs can reciprocate in close proximity to the surface ofl the plate to be etched,.means for imparting a small but rapid reciprocatin movement to the stirring device, means for imparting a slow reciprocating movement to thebath, a floating bed as a supportfor the plate to be etched, side pieces connected thereto located in recesses in the 'sides of the bath, a cover to the bath, and projections on the cover of the bath coperating lwith the side pieces to sink the floatin bed when the 'cover is closed, substantia ly as described.

4. In an etching machine, a bath containing etching liquid a cover hinged thereto having its central portion cut away, a mov'- able stirring devicev substantially closing the open central part of the cover, tracks on the sides of the cover, rollers running thereon, means passing through the central opening of the cover lfor connecting' the movable stirring device with the rollers, and means for imparting al small butrapid reciprocating movementto the stirring device.

5. In an etchin machine a bath containing etching liqui a cover hinged thereto having its central portion cut away, a movable stirrin device substantially closing the open centra part of the cover, tracks on the sides of the cover, rollers running thereon means passing through the central opening` of the cover for connecting the movable stirring device with the rollers, means for irnparting a small but rapid reciprocating movement to the stirring device, and means for imparting a slow reciprocating movement to the bat-h.

'a stirring device havin y ribs or 6. In an etching machine, a bath containing etching liquid, a stirring device having rigid ribs or prongs thereon mounted so that the ends of the r1bs or prongs can reciprocate clear of but in close proximity to the surface of the plate to be etched, a shaft mounted beyond one end of the bath, cranks at each end of said shaft, connecting rods connecting the cranks with the stirring device, a driving shaft sprocket wheels' on the crank shaft and on the driving shaft, a chain connecting the sprocket wheels, and means for operating the driving shaft, substantially as described. 7. In an etchin machine, abath containing etching liquic a rigid ribs or prongs thereon mounted so that the ends of the ribs or prongs can reciprocate clear of but in close .proximity to the surface vof the plate to be etched, a shaft mounted beyond one end of the bath cranks at each end of said shaft, connecting rods connecting the cranks with the stirring device, a driving shaft sprocket wheels on the crank 'shaft and on the driving shaft,a chain `connecting the sprocket wheels means for stirring device having operating ythe driving shaft, a Worm on the driving shaft, a worm Wheel meshing with same mounted on the framework of the machine a crank pin on same, an'd a connecting rod connecting the crank in with a pin on the etching bath, substantially as described.'

8. In an etching machine, a bath containing etching liquid, a cover hinged thereto, a

stirring device having ribs or prongs thereon mounted so that the ends of the ribs or prongs can .reciprocate in close proximity to Athe surface of the plateto be etched, atioating bed as a support for the plate to be etched, side pieces connected thereto located in recesses in the sides of the bath, projections on the cover of the tbath coperatin with the side pieces tosink the oating bed when the cover is closed, a shaft mounted beyond one end of the bath, cranks at each end of said shaft connecting rods connecting the cranks with the stirring device, a driving shaft and sprocket wheels on the crank shaft and on the driving shaft.

9. Inan etchin machine, a bath contain-l ing etching liqui a cover hinged thereto, ron s thereon mounted so that t e ends of e ri s iis or prongs canfreciprocate in close proximity to the surface of the plate to be etched, la floating bed as a support for the plate to be etched, side piecesconnected thereto located in recesses in the 'sides of the bath, projections on the cover .of the bath coperatin with the side pieces to sink the oating be when -the cover is closed, a shaft, mounted beyond one end ofthe bath, cranks Yat each end of said shaft connecting rods connecting the cranks with the stirrin device, a drivmg shaft sprocket wheels on t e `crank shaft and on the driving shaft, a worm on the driving shaft, `a Worm wheel meshing with same mounted on the framework of the machine 'a crank pin on same, and a connecting rod connecting the crank pin with a pin on the etching bath, substantially as described.

l0. In an etching machine, a bath containing etching liquid, a cover hingedthereto having its central portion cut away, a movable stirring device substantially closing the open central part of the cover and having ribs or prongs thereon the extremities of which are in close proximity to thesurfaoe of the plate to be etched, tracks on the sides of the cover, rollers running thereon, crossbars attached to ribs on the back of the stirring device and carrying the said rollers, a shaft mounted beyond one end of the bath, cranks at each end of said shaft, connecting rods connecting the cranks with pins projecting from a cross-bar on the stirring device, a driving shaft sprocket wheels on the crank shaft and on nthe driving shaft, a chain connecting the Asprocket Wheels, and means for operating the driving shaft, substantially as described.

11. In an etching machine, a bath containing etching liquid, a cover hinged thereto having its central portion cut away, a movable stirring device substantially closing the open central part of the cover and having ribs or prongs thereon the extremities of which are in close proximity to the surface of the plate to be etched, tracks on the sides of the cover, rollers running thereon, crossbars attached to ribs on the -back of the stirring device and carrying the said rollers, a shaftl mounted beyond one end'of the bath, cranks at each end of said shaft, connecting rods connecting the cranks with pins pro-v jecting from a cross-bar on the stirring device, a driving shaft sprocket wheels on the crank shaft and on the driving shaft, a chain connecting the vsprocket wheels means for operating the driving'shaft, a wornr on the driving shaft, a worm' wheel meshing with same mounted on the framework of the machine, a crank pin on same, and a connecting rod connectin the crank pin with a pin on the etching Y ath, substantially as described.

12. In an etching apparatus or the like, the `combination of a receptacle for the etching bath, means therein to hold a plate to be etched, an agitator having ribs adapted to reciprocate in the bath over the plate, and meansl to change constantly the zone of reciprocation of the agitator. h

13. InV an etching apparatus or the like, the combination of means to hold or contain a plate to be etched an agitator forthe etching bath, means to driveihe a itator, and means to effect an additional re ative movement between theplate holding or containing means and the agitator as the latter is being driven. l 14. In an etching apparatus or the like,

the combination of means to hold or contain a plate to be etched, an agitator for theetching bath, means to reciprocate the agitator, and means to effect an additional yrelative movement between the plate holdin lor containing means and the agitator as t e latter is being reciprocated.

In testimony whereof I have affixed my signature in presence of two witnesses.

' EUGEN ALBERT.

Witnesses LoUIs F. MUELLER, MATHILDE K. HELD.

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