US1466096A - Etching machine - Google Patents

Description

A. HoLMsTRM l ETCHING MACHINE 1922 2 sheets-sheet 1 Filed June y19,

lllllllelllllll Aug. 28, 1923.

A. HOLMSTRM ETCHING MACHINE I 2 sheets-sheet 2 Filed June 19. 1922 Patented Aug. ZS, 1923.

exu1.V HoLMsrnra, or sr'ooxrroriivr, vSWEDEN.

' ETCHING MACHINE v.Application filed June`19, 1922. Serial No. 569,425.

`T0 all who/m, it 'may concern.'

Be it known that I, AXEL HoLMs'rnM, a subject of the King of Sweden, residing at Drottningholmsvagen 9, Stockholm, Sweden, have invented a certain new and useful lmprovement in Etching Machines, of which the followingV is a specification.

My invention'relates to etching machines and more particularly to etching machines in which the acid is sprayed upon t-he plates to be etched by means of a revolving paddle.

The main object of my invention is to provide inexpensive means whereby the paddle may be easily and quickly put in and taken out. v f Y lA further purpose is to provide a box with an opening at one end of ythe shaft sufficiently large for easy removal through it' of the shaft and paddle, in conjunction with' a readily removable door, preferably .of stoneware or other acid resistant material,

normally tting about the shaft and closingclamping means forV holdingthe door in r place. y i Further purposes will appear in the specifica-tion and in the claims.

l have preferred tov illustrate my invention by a few forms only of the many in which it may appear, selecting these'beca'use theyI are practical, efficient and inexpensive Y the principles of my invention.-

VFigure 1 is a 'sectional'V diagrammatical view to illustratethe positionja'ndiduty; of

a addle used in etching.

figure 2 is a side elevation of an etching box equipped with my invention; Q

3-3 of Figure 2., Y i

Figure 4 is an enlarged lbroken detail segtion of Figure 3.

Figure 5 is a front elevation of another. form. Figure 6 isa section 4of Figure 5.

Figure 7 is a broken front elevation 0f another form. 'i' Y Figure v8 isa section through line 8-8 of Figure 7. Y

ln all vdrawings like numbers refer to like parts.

Referring to the drawings and describing in illustration and not in limitation l In etching devices ofv this character thel acid is conveniently placed within Va stoneware box and is thrown upon the plates by means of a stoneware paddle mounted upon a shaft that is protected from the acid by through line 6-6 being 'covered with rubber or othenprotective coating. v The bearings' ofthe shaft are placed outside of the-box to be away from the acid, the shaft extendingvclear through Ythe box and having a bearing at each end.

It occasionally happens that a paddle is broken, as by reason of an operatoraccidentally dropping a plate upon it, and when this Vhappens the paddle and shaft must' be removed, the lbroken part replaced and the whole then put back into the box.v

Y llhe level of the etching liquor within the stoneware box is well below the shaft. A revolving blade upon the paddle dips into the liquor, picks it' up andcasts it against a baffley in such a wayas to spray itupon 1Lplates placed along the opposite wall of the ox.V Y f The etching processxiswell' illustrated diagrammatically -in F igure 1 where @the stoneware tank 14 is filled with n etchingA liquor toa level t-a considerably Vbelow the shaft 15' which carrieslthe stoneware paddleld `The shaft 15 extendsV through the-sides of vthebox'- to suitable bearings 17, `'as seen in llgiire';v The revolvingpaddle v"casts the etching1-liquor into 'thebafile space 18 andfp'ast 'the baffle-19 'againsti plates 2 0' set upon a "groove 2l* along 'the stoneware restplate .122. lT he box 1 has a removable The operation ofthe-mechanism toetch loo' cover 23 and aglasscover portion 24 usually i A y n v leftin placer` A fan25 draws-a'continuous VFigure 3 is a'broken' section through line-- a plate involves removing the cover, if it be on, placing the plate 20Y upon the groove 21, replacing the cover 23, starting the paddle and continuing its operation for asuitable time drenching the plate with the etc-hing liquor, stopping the paddle, removing the cover and Withdra ing andA Washingl the plate. I f The paddle 16 may be made in a number of sections so that ifthere should be break f age, as by reason of an operator droppin-g a plate upon the paddle, ashort sectiononly of. the paddle Would have to be replaced.

The shaft at each end turns Within a' universal jointbearing 17. VThe sha-ft turns dition l5 to position the. door and this-may zontally at :28 and vertically atr29, the box 27 being free to turn vertically on the pivot Y rectly in a boX 27 Which is pivoted hori- 28-l and the pivot 28 being free to turn hori- Zontally on the pivot 29. n y Agt onel side of the box provide an opening 30 suiiiciently large to permit easy reinoval4 through it of the paddle-and shaft and I close this opening` by means of a stone- 25 Ware door 31 apertured for the shaftand approximately filling and fitting the hole 37(1)- With la flange portion 32 for fitting against the outer Wall ofthe box around the opening. ,Thfisgdoor 31 is provided with an. inwardly projecting; boss 33 for protecting the shaft from: the, acid and is somewhat recessed" at 3% to make it less heavy.Y i

Toi carrythe bearing 171 provide Wooden 35 bars; 35 andi 36, one on; each side of the box, held together by tie rods 37. These Wooden bars 35 and 36 carry the universal joint hearings 17, and Ythe bar 35 also carries brackets 38' and setlscreivs 39 for holding the 40 door 31 inY place.

I preferably'provide.y a gasket between theV face of. the flange 52 and the face of the box., against which; gasket the door is pressed. Rubber or like materia-l maybe used, Vaseline or asphaltum Willv also serve the purpose. Y

The shaft carries adriving Ypulley 40 which is driven by any suitable motor, notshown, and which in Vturn drivesthe pulleyV 11 of the fan 25. Y p

' Should it at any time .become necessary to takeout theV shaft and paddle, all thatv is necessary is to remove the pulley ll0-,ftheV brackets 38 Vand the bearings 11a-liter which VV the door 31 may be lifted Outland the Whole shaft with its paddles may befslid out longii y tudinally throughthe opening V30.?l

VVn the doorshown Yin, Figures 2 Yand 4l` the hole iscircularl andthe gatefis likevvise 60 circular'and surrounds the shaft.

lifriguresl` andY (ishowA another forni in` y VVwhich' thevgat'e isHgeneral-ly rectangular and doesnot Wholly surroundl the shaft butV fits Y'downfover the shaft', having for this pur-l 6@ posea suitable slot. rllhe lower edge of ther Y the opening.

opening has then a semi-circular groove i2 which half Way surrounds the shaft andA semicircular groove-42 asvvith the form` ofV l*1 iguie 5.` y

rilhe outside of the boi; has a guiding porinterlock with the door to forni runifays 4:16 as shown inv Figure 8. These runways are preferably made to project from the side of ytheI box Vso that thev gate: nia-y slide outside ofthe boX.

lt is. evident that these various forms arefY all broadlyV the: saine invention, and l am well a-ivare that in view of my invention` and disclosure othei` forms and variationsV Will become evident to those skilled in the art,

to meet individual vv iim or particular need,

and. I claim all such'mod-ilica-tions and variations in: so far as they fall Within the reasonable spirit a-nd Scope of my invention.

Having thus described my invention, what I claim as-Ynevv and desirev to secure by Letters Patent is 1. In an etehingiinaehine, a-boX internally resistant to etching liquor and having an opening, `asha-ft normally passing through the opening, a paddle resistantA to etching liquor mounted upon: the sha-ftl Within the box` and adapted to pass through the opening and a closure about the shaft to close the opening.. Y Y w 2. an etching machinea shaft, a p'adf dile resistant to: etching liquor mounted upon the shaft, a boX Within which the Ypaddle is adapted to operate and having an opening v in vits side surrounding the shaftin use and adapted topa-ss the paddle and shaft from.

the box, and a door internally resistant to etching liquor eandi with, the shaft approximatelyclosinfr the opening. f Y

3; Inl an. etc ing machine, a shaft, a pad` Vdle Vresistant to etching liquor mounted upon the fshaft,` a pottery box within which the paddleis adaptedto operate and having Van opening in itsV sidenormally surrounding the shaft and adaptedtopass the kpaddle and shaft'froin the box, and a door of potteryfwithj the shaft ap'pioxiinately closing 4. 1n an etehinfrinachine arshaft a ad- "die resistant.y to, etching liquor1 mounted upon the shaft, anY acid`,rresistantV box, Within. which the paddle is adapted to operate and having an opening yin. its side normallyV surrounding the shaft and adapted to pass the naeaoeeL paddle and shaft from the box, a door internally resistant to etching liquor With the shaft approximateiy closing the opening,

and a member projecting inwardly from the door to cover an adjacent portion of the shaft.`

5. In an etching machine, a box internally resistant to etching liquor, a shaft, a paddle paddle and shaft from the box, a door internally resistant to etching liquor, with the shaft approximately closing vthe opening, having an inwardly projecting portion approximately itting the contour of the opening and an external fla-nge to mate With the external rim of the box about the opening and means -for pressing the door toward the box flange.

6. n an etching machine, a shaft, a paddle resistant to etching liquor mounted upon the shaft, an acid-resistant `box Within which the paddle is adapted to operate and l'iaving an opening in its Side normally surrounding the shaft and adapted to pass the paddle and shaft from the box, a door internally7 resistant to etching liquor, with the shaft approximately closing the opening and clamping means for holding the door in place. v

7 In an etching machine, 'a shaft, a paddle resistant to etching liquor mounted upon Y the shaft, an acid-resistant box Within which the paddle is adapted to operate and having an opening* in its side normally surround-ing the shaft and adapted to pass the paddle 'and shaft from the box, a door internally f resistant to etching liquor, with the shaft approximately closing the opening, and 'a .screw clamp external of the box for no-rmally holding the door in place.

8. In an etching machine, a shaft,-a paddle resistant to etching liquor mounted upon the shaft, an acid-resistant box Within which the paddle is adapted to operate and having an opening in its sidenormally surrounding the shaft and adapted to pass the paddle and shaft from the box, a door internally resistant to etching liquor, With the shaft approximately closing the opening, a clamp external of the box for normally 4holding the door in place, a bearing vfor the shaft, and common means for supporting the ola-mp and the bearing.

y -AxEL HOLMSTRM.

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