US1805730A - Means for impregating and coating flexible materials - Google Patents

Description

May 19, 1931. E. WElNHEli/l 1,895,730

MEANS FOR IMPREGNATING AND CQATING FLEXIBLE MATERIALS Filed June 23, 1926 (Z/20912 for Patented May 19, 1931 PATENT OFFICE EMIL: WEINHEIM, OF NEW YORK, N. Y.

MEANS FOR IMPREGNATING AND COATING FLEXIBLE MATERIALS Application filed June 23, 1926, Serial No. 118,057, and in Germany J uly 18, 1925.

y "-ing;thecoatingv or impregnating operations and I impart uniform circumferential velocities to all rollers which partake in the feeding of the material through the machine. I further apply uniform pressure to the flexible material and to the coating or impregnating mass which is deposited on the material. I further provide means whereby the rollers or strickle boards for distributing the mass exert an absolutely uniform action.

Notwithstanding the important developments of recent years in the methods and apparatus hitherto in use for the same purpose it was not possible to obtain goods of absolutely uniform size and quality such as obtained according to this invention because the apparatus as heretofore designed were not absolutely automatic and therefore the human factor exerted a considerable influence. In my invention the human factor is eliminated altogether and perfect results are obtained with unskilled labour.

Factors which tend to detract from the quality of the finished product are irregularities in the flexible web, variations of the tension to which the web is subjected, irregularities in the strickle boards or rollers used for distributing the coating or impregnating mass, variations in the velocity of operation and irregularities in the effective diameters of driven parts.

These drawbacks are overcome according to this invention by maintaining uniform tension in the web by regulating. the pressure exerted on the web so as to make up for all irregularities, by eliminating irregularities in the distributing means, by causing the mass to be applied regularly and to be absorbed with equal regularity and by providing for uniform and automatic operation throughout.

In this manner the mass is perfectly and reliably worked into the interstices between the fibers and the pores of the fibres. Vibration of the parts is eliminated by the uniform drive and by the separate regulation of each part, electrical discharges due to friction are practically eliminated and the quality of the finished product is no longer influenced by the human factor.

In the drawings aflixed to this specification and forming part thereof a machine for carrying out the invention is illustrated dia- 5 grammatically by way of example.

Referring now to the drawings, 1 is a reel from which the web 2 is-unwound in the direction of the arrow to be wound on a drum 10 after having been impregnated or coated and dried. The coating or impregnating mass or liquid is stored in a tank 4 from which it flows freely or is extruded, and is applied to the web at the rear of two feed rollers 6 and 17. The roller 6 is stationary and carried in the frame of the machine. Rotation is imparted to it by suitable means (not shown). The roller 17 is free to rotate and to move on a track 18 under the influence of pairs of toggle levers 12, 16 which are pivoted to each other at 13 and fulcrumed to the frame of the machine at 11. 14 is a chain secured to the pivot 13, and 15 is a weight suspended from the chain. The free roller 17 is held against the driven roller 6 at resilient but constant pressure by the weight 15.

arranged between the first pair of feed roll- 05- ers 6, 17 and a second pair-8, 19, and above a table or the like generally indicated at 3. When the web has moved past this board by which the mass is uniformly distributed and which might also be replaced by a cylinder .00

or the like, it is subjected to the action of the second air of feed rollers 8, 19, the roller 8 being riven and stationary and the roller 19' being forced toward the roller 8 by a weight and a system of toggle levers. This system is similar to the system of the rollers 6, 17. The finished web is wound on the roller 10 with its lower or untreated face.

The stationary rollers 6 and 8 are rotated at the same circumferential velocity which is a function of the velocity of the rollers 1 and 10. In order to prevent variations in the circumferential velocities of the latter two rollers, rotation is imparted to them not by their respective shafts but by rollers engaging the material wound on them peripherally, as indicated at 20, 21 for the roller 1. Similar driving rollers 10, 10, are provided for the roller 10.

In this manner I provide a machine in which by suitably selecting the viscosity of the coating or impregnating mass and by exerting a suitable tension on the resilient web, it is possible to exactly predetermine the properties throughout the manufacture whereas with the existing machines and methods irregularities are inevitable for the reasons stated.

I wish it to be understood that I do not desire to be limited to the exact details of operation and construction shown and described, for obvious modifications will occur to a person skilled in the art.

I claim:

1. A machine for impregnating or coating a web of flexible material comprising a supply and a storage reel, a pair of feed rolls arranged intermediate said reels and comprising a roll mounted to rotate in a fixed bearing and a roll mounted to be displaced with respect to said first-mentioned roll, said rolls being adapted to engage opposite sides of the web, means for exerting uniform and resilient pressure on said displaceable roll,

and means for applying a coating to the web while moving from said supply to said storage reel, said reels and said fixedly supported roll web.

2. A machine for impregnating or coating a web of flexible material comprlsing a supply and a storage reel, a pair of feed rolls arranged intermediate said reels and comprising a roll mounted to rotate in a fixed bearing and a roll mounted to be displaced with respect to said first-mentioned roll, said rolls being adapted to engage opposite sides of the web, gravity-controlled means for excrting uniform and resilient pressure on said displaceable roll, and means for applying a coating to the web while moving from said supply to said storage reel, said reels and said fixedly supported roll rotating independently of the web.

3. A machine for impregnating or coating rotating independently of the a web of flexible material comprising a sup ply and a storage reel, a pair of feed ro is arranged intermediate said reels and comprising a roll mounted to rotate in a fixed bearing and a roll mounted to be displaced with respect to said first-mentioned-roll, a pair of to gle levers hinged to a fixed pivot at one en and to said displaceable roll at the other end, a weight suspended from the pin by which said levers are connected, said rolls bein adapted to engage opposite sides of the we means for exerting uniform and resilient pressure on said displaceable roll, and means for applying a coating to the Web while moving from said supply to said storage reel, said reels and said fixedly sup orted roll rotating independently of the we In testimony whereof I afiix my signature.

EMIL WEINHEIM.

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