US2771120A

US2771120A - Apparatus for foiling backings

Info

Publication number: US2771120A
Application number: US453395A
Authority: US
Inventors: Achilles Werner
Original assignee: Individual
Current assignee: Individual
Priority date: 1954-08-31
Filing date: 1954-08-31
Publication date: 1956-11-20
Anticipated expiration: 1973-11-20
Also published as: FR1131672A

Description

Nov. 20, 1956 w. ACHILLES APPARATUS FOR FOILING BACKINGS Filed Aug. 31, 1954 NAVNNAYAVVAv/w AY/Q APPARATUS FOR FOILING BACKINGS Werner Achilles, Celle, Germany Application August 31, 1954, Serial No. 453,395

12 Claims. (Cl. 154-37) The present invention relates to an apparatus for foiling backings, and more particularly to an apparatus for foiling backings such as paper, cardboard, and the like, with a band-shaped foil containing a cellulose compound such as cellulose hydrates, cellulose acetates, and the like.

It is an object of the present invention to avoid the defects of apparatuses hitherto known in the art.

It is another object of the present invention to guide the baud-shaped foil so that the same is free of tensions and runs smoothly in a sliding motion, so that the foil cannot tear and is not subject to an elongation or curling.

It is a further object of the present invention to shorten considerably the path of the foil through the apparatus so as to eliminate any sources of error connected with a prolonged path of the foil.

It is still another object of the present invention to provide an apparatus of the kind described hereinabove which requires the attendance of a single operator.

Other objects and advantages of the present invention will become apparent from the following detailed description thereof in connection with the accompanying drawings showing, by way of example, an embodiment of the present invention. In the drawings Fig. 1 is a diagrammatic side elevation of an apparatus according to the present invention, some parts be ing omitted for the sake of clearness,

Fig. 2 is a front elevation of a part of Fig. 1, and

Fig. 3 is a front elevation of a detail of Fig. l on an enlarged scale.

Referring now to the drawings, the apparatus comprises a system of cylinders or rollers including a cylinder 1 adapted to carry a roll of band-shaped foil 10. a plurality of guiding rollers such as 2, 2a, 2b, 2c, and 2d, a glue-applying roller 3 forming part of a glueapplying device to be described more in detail hereinafter, a pressure roller adapted to be heated by warm water and directly driven by the gear 50 of a motor 25, a counterpressure roller 11 provided with a suitable rubber covering (not shown), foil-spreading rollers such as 8 to be described more in detail hereinafter, a takeup cylinder 13 spooling the backed foil, an auxiliary roller provided with a rail 20a to be described more in detail hereinafter, and a driving roller 18 forming part of a leading device including an endless band 12 and a tightening roller 19, said leading device leading the backing to the counter-pressure roller 11.

All these rollers except the guiding roller 2, the driving roller 18 and the tightening roller 19 are arranged inside a housing generally denoted by and comprising a front wall 31, a top wall 32 and a rear wall 33. The housing 30 consists preferably of steel and is subdivided by a horizontal intermediate wall 34 subdividing the housing 30 into an upper portion 35 and a lower portion 36. The upper portion 35 of the housing 30 is subdivided by a wall means 22 into a front part 37 and a rear part 38. The wall means 22 have an upper edge States Patent 0 F 2,771,120 Patented Nov. 20, 1956 39 arranged at a distance from the top wall 32 of the housing 30. A roller 9 is arranged above the upper edge 39 of the wall means 22 and separated by a gap 40 from the top wall 32 of the housing 30. The roller 9 guides the band-shaped foil 1a through the gap 40 so that the foil 1a ascends in the front part 37 and descends in the rear part 38. The gap 40 forms a drying channel for the air flowing through the gap 40 in the direction of the arrow 41.

The path of the band-shaped foil 1a after leaving the cylinder 1 shall now be described more in detail as follows:

The foil 1a passes over the first guiding roller 2 arranged outside the housing 30 which it enters through a horizontal slot 42 arranged just above the horizontal partition 34. Then the foil 1a passes around a second guiding roller 2b arranged inthe front part 37 of the housing 30 near the partition 34. Then the foil 1a is led between the glue-applying roller 3 and a third guiding roller 2a which presses in the working position thereof the foil 1a against the glue-applying roller 3 driven by a V-shaped belt 52 driven by the pressure roller 10 driven directly by the motor 25 arranged at the bottom of the lower part 36 of the housing 30. The glue-applying roller 3 dips into a glue container 4 forming part of the glue-applying device. The container 4 is open at the upper side thereof and glue is led into the container 4 by a first pipe 5 dipping with the lower end thereof into the container 4. The glue is Withdrawn from the container 4 by a second pipe connected with a pump (not shown) pumping the glue into a glue reservoir (not shown) arranged at a high level, from which the glue is returned through the first pipe 5. The third guiding roller 2a presses inthe working position thereof shown in full lines, the foil 1a against the roller 3 and may be moved into an inoperative position indicated in dotted lines which it reaches by moving the roller 2a in the direction of the arrow 43. The inoperative position is taken by the roller 2a at stopping periods of the apparatus in order to avoid a gluing of the foil to the glue-applying roller 3 which is stationary during the stopping periods.

The container 4 is provided at the upper edge thereof with a rail 6 for wiping off any excess glue from the glue-applying roller 3 so that the glue is applied to the foil 1a in a uniform thickness. The rail 6 is rigidly connected at the ends thereof with the casings 6a of ball bearings (Fig; 3) in which the glue-applying roller 3 runs with the trunnion-like ends'3a thereof which are supported by ball bearings 3b the casings of which are rigidly supported by vertical walls a and 69b of the steel housing mentioned hereinabove. The casings 6a are supported by steel or iron members 61; which are connected by connecting members 4a with the glue container 4. Thus any vibrations of the rail 6 are equalized and a uniform. application of glue is assured. Thus the glue container 4, the glue-applying roller 3, and the rail 6 form a whole which can be observed through a sliding window 7 arranged in'the front wall 31 of the housing 30' above the slot 42.

The band-shaped foil 1a passes over a pair of guiding rollers 2c arranged in the front part 37 of the housing 30 after which they pass over a first foil-spreading roller 8 arranged in the front part 37 of the housing 30 in contact with the roller 9 arranged above the upper edge 39 of the wall means 22. The foil-spreading roller 8 is shown in a front elevation in Fig. 2 and provided with two threads 8a and 8b extending from the mid-portion to the outer parts of the foil-spreading roller 8, respectively, the threads 8:: and 812 being oppositely directed. The foil-spreading roller 8 is in contact with the 3 roller 9 so as to be driven oppositely to the direction of rotation of the roller 9. The threads 8a and 8b of the roller 8 have the eiiect that the band-shaped foil in is smoothed even when the apparatus runs at a high speed. Afterpassing the roller 9 the band-shaped foil in descends in the rear part 58 of the housing 3i) and passes downwards over further guiding rollers 2d to the pressure roller 14) being in contact with a second foilspreading roller 8 which is provided with twooppositely directed threads (not shown) corresponding to the threads 8a and 8b of the roller 8. ,The foil passes then ever part of the perimeter of the roller 10 and into the gap separating the latter from the counter-pressure roller 11 into which is led the backing 44 guided by a device generally denoted by 45 and arranged outside the housing 3h opposite to the rear wall 33 thereof. The foil in and the backing 44 are united by the pressure exerted by the pressure roller 10 and the counterpressure roller 11 so as to form a backed foil 46 which is spooled by .a cylinder 13 driven from the pressure roller 10 by means of a chain 54 and a slipping clutch 56.

The pressure roller 10 is heated with warm water so that the glue recovers the gluing power thereof which it has lost in the first pipe and the second pipe 5a. The warm water circulates continually through the pressure roller 1%} to which it is supplied by a supply pipe 14 and from which the water is withdrawn through an exit pipe Lia. In order to secure a uniform pressure of the counterpressure roller 11 against the pressure roller over the entire length thereof the counterpressure roller it is hydraulically supported by means of two piston rods such as 47, the pistons (not shown) of which are moving in two pressure cylinders such as 15 acting upon the of the shaft 11a of the counterpressure roller it. The cylinders such as 15 are supplied with oil from an oil storage tank or reservoir 16 through a common oil pressure conduit 17. The counterpressure roller 11 is uniformly pressed against the pressure roller 10 by the oil pressure exerted on the pistons (not shown) of the pressure cylinders such as 15 so as to secure a parallel running position of the pressure roller 10 and the counterpressure roller 11 and to equalize any impacts to which the rollers might be subjected. Since the pres sure exerted on the shaft 11a of the counterpressure roller 11 is uniform over the entire length of the shaft lie, the pressure may be much lower than in apparatuses hitherto known in the art; also the use of a rubber covering (not shown) of the counterpressure roller it contributes to this and allows to operate with a much lower working pressure than the paper or asbestos rollers used hitherto in the art which frequently damage the backing to be united with the foil by formationof creases if the backing consists of paper, or by shocks exerted on the edges of a backing consisting of cardhoard. Gwing to the lower working pressure the structure of the calender need not be as strong as in the apparatuses known hitherto in the art.

The backing to be covered by the foil is supplied by the endless band 12 driven by the driving roller 13 and tightened by the tightening roller 19 so as to form an upper portion 12:! and a lower portion 12b. The driving roller 18 is preferably provided with grooves 58 and driven by the gear 50 of the motor through a chain 62.

The auxiliary roller 20 is provided with end discs such as 2% driven by friction by the counterpressure roller It so as to rotate in opposite direction, so thatthe backing 4d coming from the endless band 12 passes underneath the auxiliary roller 20 before the backing 44 enters the space between the counterpressure roller 11 and the pressure roller 10 driven by an infinitely variable speed transmission (not shown) driven by the motor 25. Thus it is accomplished that the backings 44 consisting of cardboard, paper, or the like which are placed on the endless band 12 so that the side edges thereof do not (iii overlap, are kept in position and the edges thereof are not bent upwards. The rail 20a connects the auxiliary roller 20 with the counterpressure roller 11, the rail being arranged parallel to the axis of the auxiliary roller 2%. The rail 20a serves for introducing the backings 44 leaving the auxiliary roller 20, uniformly and without formation of creases into the space between the pressure roller 1% and the counterpressure roller 11 so that the backing is united with the foil 10 without any creases forming.

in order to ventilate the drying channels formed by the front and rear parts 37 and 38 and the gap 40, air is admitted by an opening 21 arranged in the front wall 31 of the housing 39. The opening 21 contains two upcrturcd sheet-metal strips 21a, 21b which are arranged one on the other, one of the strips being laterally dispiaccahle so that the size of the apertures can be varied. The air introduced through the apertured strips 21a, 21b arranged in the opening 21 moves upwards in the direction of the arrow 48 and passes through the front part 37 of the housing. Then it enters the gap 49 along the arrow 41 and descends in the rear part 38 of the housing and leaves the same in the direction of the arrow 49 through a suction conduit 23. In consequence thereof the .air flows around the foil in in the gap 43 so that the solvent contained in the glue is removed and the glue is rapidly dried. By adding hot air the drying process may be accelerated so as to render' possible an increase of the speed at which the foil 10 travels through the

parts

37, 40, and 38 of the housing 3-0.

Preferably a suction conduit 32 is arranged outside and near the rear wall .33 of the housing 30 and communicates with the same. An air suction device 24-is arranged between the upper and

lower portions

12a, 12b ofithe endless band 12 and connected with the downward branch 23a of the suction conduit 23. Thus it is achieved that the air is sucked off from the chamber arranged between the .upper and

lower portions

12a and 12b of the band 12 and enclosing the air suction device 24 so that the backings 44 being on the endless band 12 are pressed by suction against the same, thus obtaining a firm attachment of the successive edges of the backings 44 to one another even before the auxiliary roller 20 is reached.

The operation of thisdeviceiis as follows:

The foil 10 is rolled off from the cylinder 1 and led by the guiding roller 2 to the slot 42 through which it enters thefront part 37 of the housing. The foil 1a passes the glue-applying roller 3 and is then led upwards through the front part 37 ,to the roller 9 being in engagement with the foil-spreading roller 8 which spreads the foil covered with glue as described more fully hereinabove. Then the foil 1a descends in the rear part 38 of the housing 30 and is led into the space between the pressure roller 16 heated by the pipes 14, 14a, and the counterpressure roller 11. In this space the foil is united with the backing 44 so as to form a hacked foil 4-6 which is taken up by the take-up cylinder 13. -At the same t me air circulates through 'the parts 37 and 38 of the housing so as. to dry the foil 1a. The air is withdrawn through the suction conduit 23 and supplied to the suction device 24 arranged in the chamber 50.

In order to prevent the vertically hanging foil band from hanging through in the horizontal portion thereof, the rollers are arranged so as to guide the foil band substantially in the vertical direction. In order to ac complish this the plurality of the rollers is arranged vertically one above thebther in a vertical drying channel. By this design of the drying channel the latter is reduced in its lateral dimensions to a fraction of the length hitherto usual in the art. A further advantage of this structure consists in that the working path of the foils is considerably reduced so that other sources of error due to the usual length of the working path are overcome.

A machine of the kind described hereinabove needs only one-man service.

It should be understood that numerous changes may be made in the form, construction, and arrangement of the several parts of the illustrated apparatus for foiling backings without departing from the spirit and scope of my invention or sacrificing any of its attendant advantages, the apparatus herein described being merely for the purpose of illustrating the invention.

I claim:

1. An apparatus for foiling backings with a bandshap'ed foil containing a cellulose compound comprising, in combination, a housing having a front wall, a top Wall, and a rear wall, a cylinder arranged outside said housing opposite to said front wall thereof, said cylinder being adapted to carry a roll of band-shaped foil, means for pulling said band-shaped foil from said cylinder through a first opening in said front Wall of said housing, a glue-applying device arranged inside said housing near said first opening in said front wall thereof, said glueapplying device applying glue to said band-shaped foil after the same has passed said first opening in said front wall of said housing, means for guiding said band-shaped foil covered with glue upwards in said housing near said front wall thereof, wall means arranged substantialiy vertically in said housing between said front and rear walls thereof, so as to separate said housing into a front part and a rear part, said wall means having an upper edge arranged at a distance from said top wall of said housing, a roller arranged above said upper edge of said wall means and separated by a gap from said top wall of said housing, said roller guiding said bandshaped foil through said gap so that the same descends in said rear part of said housing, a first foil-spreading roller arranged in said front part of said housing in contact with said roller separated by said gap from said top wall of said housing, means for guiding said band-shaped foil downwards through said rear part of said housing, a heatable pressure roller arranged near the lower part of said rear wall of said housing below said means for guiding said band-shaped foil downwards, a second foilspreading roller arranged above said pressure roller in contact therewith, a counterpressure roller arranged below said pressure roller near said lower part of said rear wall of said housing, a device arranged outside said housing opposite said rear wall thereof for leading a hacking into said housing through an opening arranged in said rear wall thereof opposite the common edge of said pressure roller and said counteipressure roller whereby said backing and said band-shaped foil are passed between said pressure roller and said counterpressure roller, so as to form a back foil, and take-up cylinder arranged outside said housing opposite said front wall thereof, said take-up cylinder spooling said backed foil after the same has passed a second opening in said front wall of said housing.

2. An apparatus as claimed in claim 1, an auxiliary roller arranged inside said housing near said opening in said rear wall thereof, said roller having parts being in contact with said counterpressure roller so as to be driven by the same, and a rail connecting said auxiliary roller with said counterpressure roller, said auxiliary roller and said rail leading the backing from said device to said common edge of said pressure roller and said counterpressure roller.

3. An apparatus as claimed in claim 1, said leading device including an endless band, a roller driving said endless band, and a roller for tightening said endless band.

4. An apparatus as claimed in claim 1, said counterpressure roller having a rubber covering.

5. An apparatus as claimed in claim 1, a pressure cylinder supporting the axis of said counterpressure roller, an oil reservoir, and a pressure conduit connecting said oil reservoir with said pressure cylinder.

6. An apparatus as claimed in claim 1, said glueapplying device including a glue-applying roller, a rail for wiping ofi excess glue from said glue-applying roller, first ball bearing casings secured to the ends of said rail, said glue applying roller having trunnions extending through said first ball bearings, and second ball bearing casings arranged in a wall of said housing and rigidly connected thereto, said second ball bearing casings supporting the ends of said rail in said walls of said housing.

7. An apparatus as claimed in claim 1, an air inlet arranged in said front wall of said housing, and a suction conduit arranged outside and near said rear Wall of said housing, and communicating with said housing, said gap separating said upper edge of said Wall means from said top wall of said housing forming a drying channel for the air entering through said air inlet and leaving through said suction conduit.

8. An apparatus as claimed in claim 1, said leading device including an endless band having an upper portion and a lower portion, a suction conduit arranged outside and near said rear wall of said housing and communicating with said housing, and an air suction device arranged between said upper and lower portions of said endless band and connected with said suction conduit.

9. An apparatus as claimed in claim 1, and a motor arranged in the lower part of said housing, said motor driving directly said pressure roller.

10. An apparatus as claimed in claim 9, a V-shaped belt driven by said pressure roller, said glue-applying device including a glue-applying roller driven by said V-shaped belt.

11. An apparatus as claimed in claim 9, and a chain driven by said pressure roller, said take-up cylinder being driven by said chain.

12. An apparatus as claimed in claim 9, a gear driven by said motor, a chain driven by said gear, and a driving roller forming part of said leading device, said driving roller being provided with grooves and being driven by said chain driven by said gear of said motor.

References Cited in the file of this patent UNITED STATES PATENTS 116,173 Fitzgibbons June 20, 1871 499,274 Wilson June 13, 1893 1,154,874 Meade Sept. 28, 1915