US2253511A - Paper treating machine - Google Patents

Description

Aug. 26, 1941. A. D. ElTZEN PAPER TREATING MACHINE Filed May 1, 1937 3 Sheets-Sheet 1 Augist D. Eitml,

IJ INVENTOR.

ATTORNEY.

Aug. 26, 1941. A. D. EITZEN 2,253,511

PAPER TREAT ING MACHINE F iled May 1, 1957 s Sheets-Sheet 2 Aug. 26, 1941. A. D. EITZEN 2,253,511

PAPER TREATING MACHINE Filed May 1; 1937 3 Sheets-Sheet 3 Patented Aug. 26, 1941 PAPER TREATING MACHINE .August D. Eitzen, Rockville Centre,'N. Y., assignor to News Projection Corporation, New York, N. Y., a corporation of New York Application May 1, 1937, Serial No. 140,196 3 Claims. -(Cl. 34-155) This invention relates to a paper treating machine and especially a machine for treating paper, such as glassine or the like to obtain a maximum efficiency out of the same when used as a instance as projection machine tape. r

Among the objects of the present invention, is aimed to provide an improved paper treating machine whereby a roll of paper, such as glassine paper of about twenty-four inches in width as an instance is first fed to a coating bath and then drawn upwardly through a drying chamber or tower and again drawn down to a windup reel whereby the speed of the windup reel and supply of the reel are regulated substantially to correspond to one another and in which suitable tension is supplied at predetermined intervals in the path of travel of the tape to maintain the same smooth and free from wrinkles throughout and effect a tight windup on the windup reel.

Still another object of the present invention is to provide a paper treating machine in which there is provided a tower through which the tape is fed upwardly and while moving upwardly depending upon the composition of the coating, height of the tower and speed of travel, a draft of heated air is drawn past the tape while it is travelling through the lower part of the tower and a draft of cold air drawn past the tape while it is travelling through the other part of the tower with a view effectively to dry and harden the coating being produced on the tape.

These and other features, capabilities and advantages of the invention will appear from the subjoined detail description of specific embodiments thereof illustrated in the accompanying drawings in which Figure 1 is a side elevation of one embodiment of the present invention;

Fig. 2 is a section on the line 2-2 of Fig. 1; Fig. 3 is an enlarged fragmental section of the supply reel, coating bath and entrance to the drying chamber of the embodiment illustrated in Fig. 1;

Fig. 4 is a section on the line 4-4 of Fig. 3;

Fig. 5 is a transverse section of the rollers engaging the tape after it leaves the bath of another embodiment;

Fig. 6 is an enlarged fragmental section of still another embodiment showing the path of movement of the tape before being coated and again after being coated and before being dried; and

Fig. '7 is a section on the line 'I'| of Fig. 6.

In the embodiment shown in Figs. 1 to 4; there is shown a shaft I mounted on standards 2 on which shaft I, there is wound or mounted the supply roll 3 of paper, such as glassine paper or the like.

The standards 2 preferably of channel iron or the like are connected by suitable connecting bars 4 also preferably composed of channel iron to the wall 5 of the lower housing portion 6 which is supported by suitable standards I extending upwardly to either side of the pan or trough 8, in the present instance, containing the coating liquid or the like. The trough 6 is preferably removably mounted between the standards I, 'I so that it may be removed for cleaning or the like or for replacement by another type of coating trough or coating device.

Above the housing portion 6, there is formed an enlarged casing 9 having a plurality of heating units In for heating theair disposed to either side of the path of travel of the tape I3, the lower end of the housing 9 having two dampers II and I2 that are provided to adjust the size of the entrance for the tape I3.

The upper end of the enlarged casing 9 is rovided with an extended flat housing or tower I4 composed of two opposing walls I5 about thirty inches in width and in the present instance spaced about three inches from one another to form a passage for the tape I3.

At the top of the tower I4, there is formed a roller I6 drivingly connected to the motor I! mounted on the platform It extending from the upper end of the tower I4. roller I6, the tape I3 passes out of the tower I4 and over the roller I9 formed at the upper end of the arm 20 extending upwardly from one side of the tower I4 so that the tape will merely effect about a forty-five degree wrap around theroller I6. Preferably thespeed of the roller I6 is so regulated that'it will be faster than the feed of the tape so that it will slip relative to the same and thereby iron out the wrinkles and center the tape. From the roller I9, the tape then passes down to the'roller 2I journaled in the frame 22 and drivingly connected with the motor 23 to rotate in the reverse direction to the direction of travel of the tape whereby the tape will be further smoothed out and centered and tension imparted to it so that the tape will ultimately be t ghtly wrapped on the windup reel 24.

Before passing to the wind-up reel 24, the tape I3 passes up over the idler 25, then down under the idler 26 and then up over the idler 21 before passing to the windup reel 24. The windup reel 24 is mounted on the shaft 28 journaled in the frame 22 on which shaft there is mounted the After leaving the pulley 23 which is drivingly connected to the motor 38.

The tape I3 is subjected both to a heating and cooling effect while passing through the tower l4. The height of the tower l4, the speed of travel of the tape and the composition of the coating will determine the temperatures of the air drawn through the tower l4 and the location of the manifold 3| which divides the cold stream from the heated'stream of air. The reservoir 3| is connected by the conduit 32 with the suction fan'33 connected to the motor 34. The fan housing 35 in the present instance is connected to a suitable partition 38 or the like.

In the present instance, the manifold 3| is dis- 115 posed about two-thirds the distance up the tower |4 so that the fan through the manifold 3| will draw heated air so heated by the heating units l8 up through two-thirds the length of the tower l4 and cold air from the open end of the tower |4 through one-third of the length of the tower H in which case during the first two-thirds distance of the travel of the tape l3 through the tower I4, it will be subjected to a stream of heated air and for the remaining one-third distance of the travel of the tape |3 through the tower I4, it will'be subjected to a cold stream of air.

For controlling the streams of hot and cold air in the tower l4, there are provided the dampers 31,and 38 for the cold air and the dampers 39 and 48 for the;heated air. Preferably so that the temperaturein the tower |4 below the manifold 3| may be taken for the purpose of regulating, the tower I4 is provided with a thermometer 4| extending therefrom as indicated.

When the coating mixture consists of as an instance copai, alcohol, and castol oil, for a predetermined speed of travel of the tape and height of tower M at least ten feet, the temperature maintained below the manifold 3| is preferably about one hundred and forty degrees Fahrenheit.

It is of course obvious that the greater the height of the tower l4 with a given temperature and given consistency in composition of coating material, the faster the tape may be advanced through the tower |4 when a predetermined degree of dryness and hardness of the coating is desired.

The mechanism now to be described is mainly concerned with regulating the speed of the supply roll 3 irrespective of its decreasing diameter and the increasing diameter of the windup reel 24. As an instance, after leaving the supply roll 3, the tape f3 first passes under the driven roller 42 and then over the idler 43 rotatably mounted at the ends of the arms 44 pivotally connected to the standards 2. From the idler 43, the tape l3 then passes under the rod 45 formed at the ends of the arms 48 pivotally connected to the standards 2 below the arms 44.

Thereupon, the tape I3 passes up over the adjustable roller 41 mounted in the blocks 48, Fig. 4, and then down under the rods 49 and 58,

. preferably disposed at the same level so that the trough 8 with its bath may be raised to immerse the path of movement of the tape and therewith the tape under the succeeding rods 43 and 58. From the rod 49, the tape l3 then passes upwardly with one face engaging an edge of the scraping block 5| and then on so that its other face engages a face of the scraping block 52. The blocks 5| and 52 are preferably adjustably mounted so that a greater or less loop or bend may be formed in the tape l3 when passing from the bath in the trough 8 up to and into the casing 8. according to the thickness of the coating to be formed on the paper.

On the top of the arm 48, there is mounted a mercury switch 53 forming an oblique angle with the arm 48 and to the lower face of the arm 48 there is secured a second mercury switch 54 with its tube substantially parallel to the length of the arm 48 so that when the arm 48 is raised into the upper dash and dot line position both the'switches 53 and 54 will be closed and when the arm 48 is lowered into the lower dash and dot line position, both the switches 53 and 54 will be open. The wiring connecting.

the motor 55 with the switches 53 and 54 is substantially as follows. One main lead 58 is connected direct to the motor 55. The other main lead 51 is connected to the rheostat 58 which in turn is connected to one of the contacts 58 of the switch 54 by the conductor 88. The other contact 8| of the switch 54 is connected by the conductor 82 to one of thecontacts 83 of the switch 53 and the other contact 84 of the switch 53 is connected by the conductors 85 and 88 to I the motor 55. The contact 8| of the switch 54 is also connected to the resistance 81 which in turn is connected to the conductor 88 by the conductor 88 so that when the arm 48 is in its uppermost position and both switches are closed. the resistance will be shunted and the motor 55 operate at top speed. While when the arm 48 is in the intermediate position and only the switch 54 is closed, the resistance will be cut in and the motor 55 operated at a lower speed and when the arm 84 is in the closed position indicated where both switches will be open the motor 55 will be brought to rest. Since, see Fig. l, the driven roller 42 is drivingly connected to the motor 55'.

In other words, where the tape I3 is advanced by the surface speed of the roller 42, the speed transmitted to the tape will of course be uniform at any given speed irrespective of the diameter of the supply roll 3.

However, since the shaft 28 of the takeup reel 24 is rotated, the speed transmitted to the tape as the diameter of the reel increases will of course increase. It will therefore be necessary to compensate for this increased speed. For this purpose, the control arm 48 is provided. It will be obvious from the foregoing that when the speed transmitted to the tape by the reel 24 is greater than that transmitted to the tape by the roller 42 when the resistance 81 is cut out, it will take up the slack formed by the arm 48 and eventually raise the arm so that the mercury switch 53 is closed when the resistance 81 will be shunted and the motor 55 operate at top speed in turn to increase the speed of the roller 42.

Preferably the speed so transmitted to the roller 42 will be greater than the fastest speed transmitted to the tape by the reel 24 so that the roller 42 will quickly again form a suiiicient loop to permit the arm 48 to drop at least into the full line position shown in Fig. 3. This see-sawing action of the arm 48 ofcourse will not in any way materially affect the tension in the tape l3 and the arm 48 will at all times take up the slack substantially as quickly as it is being formed. The roller 41 by the mechanism now to be described may be inclined to the horizontal with either end raised according tothe formation of the tape since it has been found that the average tape mounted upon a roller is not only not uniform in thickness throughout but actually is inclined to spiral.

The blocks 48 havebeveled lower ends 89 to cooperate with the beveled slots I in the rod II slidably mounted in the bracket walls I2 and 13. One end I4 of the rod II is threaded to receive the nut 15. The other end of the rod 'II is provided with a pin 16 between which and the end wall 13, there is compressed a spring IT.

From the foregoing, it will appear that when the nut 15 is screwed inwardly, it-will contract the spring 11 and raise the left handend of the rod 41, whereas when the nut 15 is screwed outwardly, the spring I1 will cause the rod II to be moved toward the right to raise the right hand end of the rod 41.

In order to prevent the supply roll 3 from unraveling, it is desirable to have the brake 18 provided at the end of the arm 19 pivoted at 80 to the Wall I -0f the tower I4. This brake 78 resting on the roll 3 will prevent the same from unraveling and incidentally increasing the frictional resistance as the diameter of the roll decreases.

In the embodimentshown in Fig. 5, instead of the stationary scraping blocks 5I and 52, there is provided a driven roller 8| preferably drivingly connected to a motor, such as the motor 55 by means not shown. The tape 82 is pressed into driving engagement with the roller 8| by the rubber lined roller 83 rotatably mounted at the end of the arm 84 pivotally mounted at 85. The arm 84 is also provided with an extension 86 having an adjustably mounted weight 81 to cooperate with the arm 84 to exercise the desired pressure on the tape 82 in opposition to th roller 8|. In the embodiment shown in Figs. 6 and 7, there are shown means for guiding the tape so that only one face thereof may be coated. As an instance, when the tape 88 leaves the adjustable roller 89 similar to the roller 44, it passes under two successive stationary rods 90 and 9| and then around the roller 92 and then around a portion of the surface of the roller 93 which has its lower portion preferably below its shaft 94 immersed in the bath 95 formed in the trough 9.6.

From the roller 93, the tape 88 then passes around to the roller 91 to guide it or position it for passage upwardly between the dampers 98 and 99 at the lower end of the housing I00. It will be noticed that the shaft IOI of the roller 91 is journaled in the plates I02 and I03 which are slot and pin connected to the side walls I04 and I05 respectively and fulcrumed on the shaft 94.

The shaft 94 of the roller 93 preferably as shown is also journaled in the Walls I04 and I05 so that the plates I02 and I03 may be adjusted relative to this shaft 94 as a center. The shaft 94, see Fig. 7, is preferably drivingly connected to the motor I05. The adjustment of the plates I02 and I03 is also provided to regulate the thickness of the coating to be formed on the paper 88.

In the interest of further regulating the thickness of the coating to be formed on the paper 88, the speed of the roller 93 may also be changed as an instance by th rheostat I01 of the motor I06, the differential between the surface speed of the roller 93 and the advancing speed of the tape 88 determining the thickness of coating on the same.

When desired the roller 41 illustrated in Fig. 4 may be anchored against rotation by the pin I08 connected to the plate I09 extending from the wall 12.

It is obvious that various changes and modifications may be made to the details of construction without departing from the general spirit of the invention as set forth in the appended claims.

I claim:

1. The combination of a tape supply roll, a take up reel, means for drying a freshly coated tape including a vertically extended drying housing, uide rollers adjacent the bottom and top of the housing for guiding the tape substantially along the longitudinal axis of the housing with the walls of the housing specad from the front and rear faces of the freshly coated tape, means for actuating said take up reel to pull the tape as it is supplied by said supply roll over said guide roller adjacent the bottom of said housing and then upwardly through said housing, then over the guide roller adjacent the top of said housing and then downwardly to said take up reel, means for driving th roller at the top of said housing at a greater surface speed than that imparted to the tape by said take-up reel, a third roller cooperating with the roller at the top of said housing and said take-up reel tending to retard advancement of the tape to smooth out the same and center it, and means for actuating said third roller in the reverse direction to the direction of movement of the tape, said third roller engaging the tape after leaving said housing and at the level of the lower end of said housing.

2. The combination of a tape supply roll, a take up reel, means for drying a freshly coated tape including a vertically extended drying housing, guide rollers adjacent the bottom and top of the housing for guiding the tape substantially along the longitudinal axis of the housing with the walls of the housing spaced from the front and rear faces of the freshly coated tape, means for actuating said take up reel to pull the tape as it is supplied by said supply roll over said guide roller adjacent the bottom of said housing and then upwardly through said housing, then over the guide roller adjacent the top of said housing and then downwardly to said take up reel, and means for driving the roller at the top of said housing at a greater surface speed than that imparted to the tape by said take-up reel for exercising tension on the tape to smooth out the same and center it and thereby impart a surface speed greater than the advancing speed of the tape adjacent the upper end of said housing.

3. The combination of a tape supply roll, a take up reel, means for drying a freshly coated tape including a vertically extended drying housing, guide rollers adjacent the bottom and top of the housing for guiding the tape substantially along the longitudinal axis of the housing with the walls of the housing spaced from the front and rear faces of the freshly coated tape, means for actuating said take up reel to pull the tape as it is supplied by said supply roll over said guide roller adjacent the bottom of said housing and'then upwardly through said housing, then over the guide roller adjacent the top of said.

housing and then downwardly to said take up reel, and means in engagement with the tape for exercising tension on the tape to smooth out the

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