US1176971A - Coating-machine. - Google Patents

Description

5 SHEETS-SHEET 1.

- Patnted Mar. 28,1916];

W- P. MARSH & W. A. SCOTT. COATING MACHINE.

APPLICATION nuzo JULY 31,1909.

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COATING MACHINE.

APPLICATION FILED JULY 31. 1909.

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Patented Mar. 28, 1916.

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W. P. MARSH & W. A. SCOTT.

, COATING MACHINE. APPLICATION FILED JULY III, 1909- Patented Mar. 28, 1916.

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APPLICATION flL ED JULY 31, I909- Patented Mar. 28, 1916.

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W. P. MARSH & W. A. SCOTT. COATING MACHINE.

APPLICATION FILED JULY 31, 1909. 1,176,971.

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Patented Mar. 28, 1916.

WILLIAM P. MARSH AND WILLIAM ALLISON SCOTT, OF INDIANAPOLIS, INDIANA,

ASSIG-NORS, BY MESNE ASSIGNMENTS, 'lIO NATIONAL CONING MACHINERY COM- PANY, OF INDIANAPOLIS, INDIANA, A CORPORATION OF INDIANA.

COATING-MACHINE.

Specification of Letters Patent.

Patented Mar. 28, 1916.

Application filed July 31,- 1909. Serial No. 510,637.

To all whom it may concern Be it known that we, WILLIAM P. MARSH and WILLIAM ALLISON SCOTT, both citizens of the United States, residing at Indianapolis, in the county of Marion and State of Indiana, have invented certain new and useful Improvements in Coating-Machines, of which the following is a specification.

Our invention relates to machines for dipping articles into fluid baths and is particularly adapted for dipping paper or fabric receptacles into melted paraffin or other water-proofing solution. However, the machine is not limited to said use but may be readily adapted to dipping other articles of various shapes into paints, oils, varnishes or other liquids.

The object of the invention is to simplify the structure as well as the means and mode of operation of such machines whereby they will not only be cheapened in construction but willbe more eflicient in use, easily and rapidly operated and substantially automatic in their manipulations.

A further object is to provide a machine which will carry the article through the various operations of dipping, draining. and drying without the necessity of the articles being handled by the operator, thereby maintaining them in better sanitary condition which is especially desirable .in the case 'of paper milk bottles for which the machine as herein shown and described is particularlv adapted.

With the above primary and other incidental objects in view as will more fully appear in the specification, the invention consists of the features of construction the parts and combinations thereof and theping tank showing a, portion of the drainer.

Fig. 4 is a transverse sectional .view of the dipping tank showing a portion of the carrier and inclined supporting strip. Fig. 5 is a side elevationpartly in section of the drainer device'showing in dotted line'sthe various positions assumed by the bottle in from the drainer to the drying oven. Fig.

9 is a side elevation partly in section of the drainer device showing a modification of the means for reversing the position of the bottle prior to its discharge into the drying oven. Fig. 10 is a sectional plan view of the modified form of the drying oven and Fig. 11 is a transverse sectional view thereof in which the cooling table or apron here inafter described is not employed. Fig. 12 is a perspective view of one of the receiving members of the feeding device. Fig. 13 is a perspective view of one of the receivers of the dipping carrier. Figs. 14 and 15 are plan and front elevation views respectively of the discharge spout from the dipping tank.

Like parts are indicated by similar characters of reference throughout the several views.

The machine comprises a continuously moving feeding device in which the bottles or other articles are placed by the operator, which feeder discharges into a travelin carrier adapted to receive the articles and carry them through the dipping tank in which they are submerged in the fluid and discharge them into the drainer. In the drainer, the receptacles assume an inverted position which permits the fluid within the receptacle to escape into the bottom of the drainer from which it is returned to the dipping tank. While being discharged from the drainer the receptacles are reversed to their normalposition and are discharged from the drainer into the drying oven and thence onto the cooling table or apron from which they are removed by an operator.

In constructmg the machine there is emframe 1 is extended in opposite directions from the dripping ,tank and located on these opposite extensions are the feeding devices and the drainer respectively. The feeding device comprises two parallel traveling belts or sprocket chains 3 carrying receiving members 4 which are secured at opposite ends to the respective chains 3. The receivers 4 are shaped to conform to the article to be dipped. In the present instance the article comprises the conical paper bottles before mentioned and the receiver is formed of sheet metal with a conical depression 6 conforming to the contour of the" .box 8 by the operator and laid in the receivers 1 which receivers travel toward the dipping tank.

J ournaled in the main frame immediately above the dipping tank and arranged transversely thereof is the main drive shaft 9 carrying a bevel gear 10. J ournaled in the frame 1 is a shaft 11 carrying at one extremity a bevel pinion 12 meshing with the bevelgear 10 and at its opposite extremity a bevel pinion 13 meshing with a similar pinion 14 mounted on one of the shafts 50f the feeding device. By this means the feeding device is driven from the main shaft at such rate of speed that the receivers thereof will register with the receiving members of the dipping carrier at the point of discharge of the feeding member into the dipping carrier. There are also mounted on the main shaft 9 two comparatively large sprocket wheels 15. Supported on adjustable hangers 16 in'the top of the frame 1 is a transverse shaft 17 carrying two similar sprockets 18. Traveling over the sprockets 15 and 18 are two parallel belts or sprocket chains 19 carrying a plurality of receiving members 20. The receiving members 20 aresomewhat conical to conform to the shape of the paper bottles and are so connected to the chains and so shaped that their center line will extend. angularly with the .path of travel of the chains as shown by the dot and dash line az m,' Fig. 13. On account of the variation of proportions between the ends of the receiving member the axis of the receiving members will extend at an angle to the axis of thesupporting shafts 9 and 17 as shownin Figs. 1 and 4., The receiving members 20 are attached at.oppo-' site ends to links of the sprocket chains'19.

As the sprocket wheels 15 and 18 revolve. the receiving members 20 are carried into the dipping tank at one side thereof and submerged in the fluid as they travel about 21 by which the fluid is heated or the par-.

aflin melted in case paraffin isthe water proofing substance to be used. There is also located in the tank 2 a semi-circular strip of sheet metal 22 concentric with the path In the bottom of travel of the receiving members 20, the

said strip 22 being inclined to correspond to the inclination of the face of the carrying members 20. The axis of each of the carrying members is inclined to the axis of the supporting shafts as before described and during the passage of the receptacle through the dipping tank the paper bottle is inclined upward with its orifice at the highest point due to the said inclination of the receiving members, thereby permitting the air to escape from the interior of the bottle to be replaced by the melted paraffin or other fluid. The paper bottles are discharged from the feeding device into the several reeeiving members of the carrier above the level of the dipping tank and are carried downward into the tank passing. about the sprocket wheel 15. Upon first entering the -d1pping tank, the bottles will float upward and contact the upper side of the receiving members as shown at 23, Fig. 3. However, the inclination of the bottle upward on account of theinclined arrangement of they receiver, permits the escape of the air and the-entrance, of the fluid which causes the bottle to settle tothe lower side of the receiver where it rests in contact with the semi-circular *strip 22. As the receiver member approaches the lowest point in its path of travel, the paper bottle will rest onv the semicircular strip 22 which retains -i t in the'receiving member and upon-further :movement 8f the receiving member the paper bottle will be rolled over and over up the opposite inclination of the semicircular strip which causes the fluid contained within the bottle to wash entirely around the interior, covering every portion thereof before it is discharged from the receiving member of the carrier. The strip 22 at the discharge side of the dipping tank extends somewhat above the tank and termembers are elevated beyond the end of the minates in an inclined spout 24 down which strip 22. The spout 24 is shown in detail flange at one side of which is an extension 24 extending beyond the edge jof the flange forming a pocket adapted to engage one end of the-bottle as it rolls down the inclined flange and thereby arrest the large end or bottom of the bottle while the small end or top of the bottle continues to move which in Figs. 14 and 15 and comprises an inclined causes the bottle to tip as shown in dotted 13- 0 the slot in advance of the arms.

lines in Fig. 15, the bottle falling from the spout 24 in an inverted position. Upon their discharge from the carrier the bottles are received in the drainer which comprises an annular casing 25 having a concentric annular slot 26 in the top thereof. The opposite edges of the slot 26 are curved downward as at 27 and the slot is of such width that the bottles will hang suspended therein with their smaller end or orifice downward, the width of the slot being equal to the diameter of the bottle at a point adjacent to the bottom or the larger end whereby the bottles will not fall through the slot but w1ll hang suspended therein. Inasmuch as the bottles at the time of their entrance mto the drainer are somewhat soft and pliable due to their treatment in the hot fluid bath of the dipping tank, they are apt to be crushed by the impact when falling into the annular slot 26 of the drainer. To prevent this there is provided a bridge or support 26 in the bottom of the drainer immediately below the point of entrance of the bottles upon which the bottle will rest and which will limit the distance the bottle extends within the drainer. The bridge 26 arrests the momentum of the falling bottle and prevents it being too tightly wedged in the slot 26.

Extending through the center of the casing 25 is a revoluble shaft 28 having a plurality of radial arms 29. The shaft 28 is continuously driven from the main shaft 9 by a counter shaft 30 carrying a gear pinion 31 meshing with the main drive gear 10 and carrying at its opposite extremity a gear pinion 32 meshing with a similar pinion 33 on a transverse countershaft 34 which in turn carries a pinion 35 meshing with a similar pinion 36 on the revoluble shaft 28. The extremities of the radial arms 29 are preferably, though not necessarily, turned downward as at 37 and are adapted to engage the bottles suspended in an annular slot 26 and push. said bottles around In the lower part of the casing 25 is an annular chamber 38 in which are located a series of steam pipes 39 by which the drainer is heated. During the passage through the dipping tank the bottles receive a heavy coating of paraffin or other solution andv upon being received in the drainer in inverted position, this coating of paraffin is reheated and the excess of paraflin drains off the bottles and drips on the bottom 40 of the drainer. The drainer is set on the frame at a slight inclination and is provided with a spout 41 (see Fig. 3) which returns the melted paraffin from the bottom of the drainer to the dipping tank. The drainer may be of any desired diameter and is preferably of considerably greater proportional diameter than is shown in the drawings, thereby giving the bottles a greater path of travel 'while in the drainer and a greater opportunity for the separtion of the excess paraflin or other fluid. As the bottles approach the point of discharge'from'the drainer the lower portion of the bottle engages a transverse member 42. The annular slot 25 is widened coincident with the transverse member 42 as shown at 42 to width greater than the widest point of the bottle. The bottle approaches the transverse member 42 in the position as shown by dotted lines in Fig. 5. The lower portion of the bottle engages the transverse member 42 which arrests the movement of the lower part of the bottle while the upper or larger 'member 42.

Leading from the transverse member 42 to the drying oven is an inclined conduit 43.

The conduit 43. on account of the relative lo cation'rof the drainer and oven is curved through substantially a quarter turn. At the lower end of the conduit 43 the bottom thereof makes .an abrupt turn downward whereby the extremity of the conduit is substantially vertical as at 44. The conduit also turns substantially at right angles within the drying'oven as shown particularly in Figs. 7 and 8. After being tipped over the transverse member 42 by the action of the radial arms 29 the bottles slides in a reclining position down the inclined conduit until it reaches the abrupt drop 44. The momentum of the bottle is arrested by the bottom thereof striking the vertical wall opposite the turn 44. The space within the housing at the lower extremity of theconduit is of such dimension that the bottle cannot fall over but when dropped from the inclined conduit will remain upright. The drying oven into which the bottles are discharged from the drainer comprises an annular housing composed of two independent sections, an upper section 45 and .a lower section 46 each supported in a suitable frame work 47. Located in the lower housing 46 are a plurality of steam pipes 48 by which the drying oven is heated. Immediately above the pipes 48- are several overlapping baffle plates 49. Mounted on a shaft (not shown) concentric with the annular housing is a revoluble wheel comprising radial arms 50 which extend between the respective sections 45 and 46 of the drying oven. The radial arms 50 support an annular band 51 of screen or other perforated material which is so located on the radial arms 50 as to register with the respective sections of the annular housing. The annular band or screen 51 forms a support upon which the bottles are carried durin their travel through the drying oven. T e radial arms 50 project beyond the annular housing and carry a concentric table or apron 52. The bottles are received into the drying oven through the inclined conduit 43, the housing 53 at the lower end thereof serving to locate the bottles centrally upon the annular screen band 51. Upon the. rotation of the wheel com prising the radial arms 50 and the annular bands 51 and'52- the receptacles are carried through the annular housing 45 and during the circuit thereof are subjected to heat from the pipes 48. Anysurplus paraffin or other waterproofing solution whichmay remain upon the receptacles is reheated and drains from the screen 51 onto the baflie plates 49 by which it is carried to either side of the steam pipes 48 and allowed to drain to the bottom of the housing 46 from which it is carried back to the dipping tank b aconduit not shown. After the bott es have made substantially a complete circuit of the drying oven they engage a wall or septum 54 arranged tangentially therein and by the continued rotation of the arms 50 and the supporting screen 51 the bottles are gradually forced outward in the wall or septum 54 onto the concentric cooling table or apron 52 which is also carried on the radial arms 50.

The table or apron 52 is of sufficient width to accommodate several concentric rows. of receptacles. the point at which the receptacles emerge from the housing 45 onto the apron or table 52' are a plurality of inclined guides or switches 55 comprising vertical plates supported on a suitable frame member 56.

When the receptacles have been forced onto' the cooling table 52 by their engagement with the septum 54 they make a complete circuit of the annular housing 45 and as they complete the first rotation they engage the first ofthe switch blades'55 and are deflected outward and make another complete circuit again engaging the second of the switch blades '55 to be moved outward again. The pathof the bottle while on the cooling table is indicated by dot and dash lines and arrows in Fig. 7 'Upon completing the last circuit on the cooling table the receptacles are discharged therefrom into a suitable receiver or bin. by the .last of" the series of inclined switch blades 55. The drying oven 3 is adapted to be driven from the main drive shaft 9 by a rope-belt orother suitable driving means. .f

To retainlthe heat in the respective pore tions of the machine and to-protect the bottles or other articles during their travel through the machine against unsanitary conditions, the entire machine from the Located adjacent to which the oven is heate point wherethe bottle enters the carrier to the point where it emerges from the drying oven, is preferably inclosed in suitable casing which has not been shown in the drawings but which may be made of sheet metal or other material and, preferably covered with asbestos to better conserve; the heat. The said casing may be attached directly to the main frame 1. In Fig. 9 there is shown a modification of the method of reversing the bottles upon their discharge from the draining device. The bottle is advanced through the annular slot 26 in inverted position as before described and as shown by dotted lines at I. in Fig. 9. The lower portion of the bottle engages the transverse member 42 which arrests the movement of the lower part of the bottle while the upper or larger portion is pushed forward by the action of the radial arm 29, the bottle assuming the position shown at II., Fig 9. Upon the continued movement of the radial ,arm'29 the large end of the bottle is ad'- by its engagement with the transverse member-42 and will rest with its base on the bottom 143 and the orifice upward as shown at IV., Fig. 9. The bottom of the chute 144 is so located that when the bottles are resting thereon the upper part of the bottle projects within the path of the radial arms 29, the said arms engagin the top of the bottle will advance it within the chute 144 moving it a limited distance away from the transverse member 42 to make room for the next succeeding bottle. The chute 144 leads directly into the drying oven.

In Figs. 10 and llthereis shown a modification of the drying oven in which the coollng apron' or table is dispensed with.

The cooling apron or table as before described is especially desirable when melted paraflin s used as the water-proofing material but for some other materials the coolmg apron 1s not necessary. -The modified" form of drying oven as shown in Figs." 10 and 11 comprises an annular housing 145 shown in cross section in Fig. '11. Located in the lower part of the housing 145 are a plurality of steam heating pi es 153 by mmediately above the pipes 153 are' several overlapping baflle plates 147 similar to those before described. The inner periphery of the annular houslng 145 is provided with a continuous slot 146. Supported on a concentric shaft not shown are a plurality of radial arms 148 projecting within the housing 145 through the slot 146 and carrying within said housingtwo concentric annular rings 149. Located on the rings 149, is a covering of screen or perforated metal 150 upon which the paper bottles or other articles rest during their passage through the drying oven. The chute 144 extends within the housing 145 and immediately above the screen 150 as shown in Fig. 10. The bottles are discharged from the chute 144 onto the screen 150 which travels in the direction indicated by the arrows. After the bottles have made substantially a complete circuit of the annular drying oven, they engage a wall or septum 151 arranged tangentially therein and by the continued rotation of the arms 140 and the screen support 150 the articles are forced outward m the wall or septum 151 onto a ledge ortable 152 from which they are removed by an operator.

While the machine as herein described is especially adapted for dipping paper bottles of a conical form it may be readily adapted to handling articles of a difi'erent shapeor different nature and is not limited to the particular work hereinbefore described.

From the above description it will be apparent that there is thus produced a machine of the character described possessing the particular features of advantage before enumerated as desirable, but which obviously is susceptible of modification in its .form, proportion, detail construction, and

arrangement of parts without departing from the principle involved, or sacrificing any of its advantages.

Having thus described our invention we claim:

1. In a machine as described, the combination with article dipping mechanism, of a draining mechanism comprising a casing, a slot in said casing of less width than the maximum diameter of the article whereby the article may be suspended in said slot, resting on the oppositeedges thereof, means to advance the article through the slot, substantially as specified.

2. In a machine as described, the combination with article dipping mechanism, of a draining mechanism comprising a casing having a slot therein in which the article is adapted to be suspended in inverted .position, means to advance the article through the slot, substantially as specified.

3. In a machine as described, the combination with article dipping mechanism, of a draining mechanism comprising an annular casing, an annular slot in said casing within which the articles are suspended, a shaft, radial arms carried bv said shaft and extendingacross the annular slot, said arms being adapted to'engage the articles and ad- Vance them through the slot, substantially as specified.

4. Ina machine as described, the combination with article dipping mechanism, of draining mechanism comprising a casing having a slot therein in which the articles are suspended, traveling members intersecting the slot and engaging the suspended articles to advance said articles along the slot, substantially as specified.

5. In a machine as described, the combination with article dipping mechanism, of draining mechanism comprising a casing having a slot therein in which the articles are suspended, traveling members intersecting the slot and engaging the suspended articles to advance said articles along the slot, means to engage and arrest one end of the article while the opposite end is advanced by thetraveling members thereby tilting the article and causing its position to be reversed, substantially as specified.

6. In a machine as described, the combination with article dipping mechanism, 'of draining mechanism comprising a casing having a slot therein in which the articles are suspended, traveling members intersecting the slot and engaging the suspended articles to advance said articles along the slot, an obstruction in said slot to be engaged by the lower-portion of the article, said slot having an enlargement coincident with said obstruction whereby the advance of the article by the traveling members will cause the article to fall over the obstruction and in so doing to be reversed, substantially as specified.

7. In a machine as described, the combination with article dipping mechanism, of drying mechanism comprising a housing, a movable bottom in said housing, heating apparatus located below the movable bottom of the housing, overlapping bafiie plates intermediate the heating apparatus and movable bottom, means for discharging the artlcles onto said bottom and removing them therefrom, substantially as specified.

8. In a machine of the character described, means for conveying the articles throughout a predetermined path in a vertical position, means for turning the articles from a vertical to an inclined position, an

inclined chute down which the articles are discharged in reclining position, a substantially vertical inclosure into which the-inclined chute discharges whereby the articles will be discharged therefrom in a substantially upright position and the reverse of the vertical position first mentioned, substantially as specified. j

9. In a machine of the character described, a dipping tank, article conveying means for'conveying the articles through the tank,.a discharge chute for the articles, means located adjacent to one side of the discharge chute adapted to arrest one extremity means for conveying the articles through the tank, 'a discharge chute for the articles, down which the articles are discharged laterally, a pocket adjacent to one side of the discharge chute with which one end of the article engages whereby the article will be turned throughout substantially, ninety degrees and discharged in a longitudinal di-' rection, substantially as specified.

11. In a machine of the character described, an annular drying oven, a concentrio cooling apron, mchned guides to auto-- matically shift the articles from the oven onto the apron and to successive positions on the apron, substantially as specified.

12. In a. machine of the character described, an annular drying oven, a'movable bottom therefor, a concentric cooling -apron moving in unison with the movable bottom of the oven, stationarilv inclined guides with which the articles will engage While being carried by the movable bottom and apron whereby-the articles will be shifted to successive concentric paths, substantially as specified.

In testimony whereof, we have hereunto set our hands this 6th day of July A. l). 1909.

-Witnesses: N

J. H. KELLEY, GEORGE "GRAVES.

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