US2984540A - Printing and dyeing of pile material - Google Patents

Description

May 16, 1961 v -r E 2,984,540

PRINTING AND DYEING OF PILE MATERIAL Filed Aug. 13, 1'95? 8 Sheets-Sheet 1 INVENTORS, EEORGEH 77LL E 7' 7' MARY V TILLEZ'T ATTORNEY May 16, 1961 M. V.T|LLETT ETAL 2,984,540 PRINTING AND DYEING OF PILE MATERIAL Filed Aug. 13, 1957 8 Sheets-Sheet 2 7 FIG 4 I s 45 INVENTORS GEORGE/i TILL 77 MARY (r/LL57 ATTORNEY May 15, 1961 M. v. TILLETT ETAL 2,984,540

PRINTING AND DYEING OF PILE MATERIAL Filed Aug. 13 1957 8 Sheets-Sheet 3 ATTORNEY y 1961 M. v. TILLETT ETAL PRINTING AND DYEING 0F PILE MATERIAL 8 Sheets-Sheet 4 Filed Aug. 13, 1957 r I all'lllillilllI'llllllIl A INVENTORS,

GEORGE H TILLETT MARY TILLETT ATTORNEY May 16, 1961 M, v. TILLETT ETAL 2,984,540

PRINTING AND DYEING OF PILE MATERIAL 8 Sheets-Sheet 5 Filed Aug. 13, 1957 Q wt INVENTORS GEORGE/1'. TIL LE T7 MARY l. TILLEI'T ATTORNEY 8 Sheets-Sheet 6 M. V. TILLETT ETAL PRINTING AND DYEING OF FILE MATERIAL 1/2 F lG/5 May 16, 1961 Filed Aug. 15, 1957 ATTORNEY May 16, 1961 M. v. TILLETT ETAL 2,984,540 PRINTING AND DYEING OF PILE MATERIAL Filed Aug. 13, 1957 8 Sheets-Sheet 7 I I I INVENTORS, .1 fl as GEORGE/v! 7%![7'7' 4 z w MARYV T/LLETT H620 BY $54 ATTORNEY y 16, 1961 M. v. TILLETT ETAL 2,984,540

PRINTING AND DYEING OF FILE MATERIAL Filed Aug. 13, 1957 8 Sheets-Sheet 8 l J H I75 475 INVENTORS. F/G 24 05090554 771.; E r r MARYVT/LLETT ATTORNEY of stencils, screens, lair sprays and the like.

United States Patent PRINTING AND DYEING :OF PILE MATERIAL Mary Victoria Tillett and George Hadlow Tillett, Oscawana, N.Y., assignors, by mesne assignments, to Bigelow-Sanford, Inc., New York, N.Y., a corporation of Delaware Filed Aug. 13, 1957, Ser. No. 677,951

Claims. (Cl. 8-148) The present invention relates to the application of colored designs to pile carpeting and constitutes a continuation-in-part of application Serial No. 507,788, fi1ed May 12, 1955, now US. Patent 2,816,811 by George and Mary Tillett.

As pointed out in the aforesaid applicaion, existing techniques for applying color designs to pile carpeting have proven unsatisfactory. Previous efforts along .these lines have been many and have taken the form and use These methods have resulted in a surface application of the color designs and have proven unsatisfactory. It has been recognized that deep dyeing is preferable but where deep dyeing is to be achieved, it is necessary to resort to methods which are prohibitive in their complexity and which have resulted in an unsatisfactory product. In previous methods, the fabric was soaking wet after introduction of the coloring agent and could, therefore, not

be processed further without running or bleeding of the colors, and complicated devices for pre-drying the fabric had to be introduced, resultingin impractically cumbersome equipment and very long printing cycles. This would make the cost of the operation prohibitive even if a satisfactory product had been obtained.

Accordingly, it is the primary object of this invention to make possible the deep dyeing of pile carpeting, .in which a plurality of colors may be simultaneously applied to the carpeting without distortion of boundary lines, and in which the coloring agent will penetrate into the pile as deeply as may be desired. To achieve this object, apparatus is provided in which the various areas .of the pile to be colored arelisolated one from the other.

The apparatus includes receptacles for receiving the coloring material, said receptacles having upstanding walls which define the design to be applied, and said walls serving to substantially separate the pile from contiguous areas. The apparatus further includes means for applying pressure to the pile therebycausing the pile within the respective receptacles to be in a state of. compression,

such compression being designed to cause even distribution of all the available coloring-material in thereceptacle among the portion of the pile entering it,-the amount of coloring material present being sufiicient to saturate and impregnate thepile but to leave it reasonably dry upon removing the pile fromthe receptacle.

A further object of the present invention is to provide a novel apparatus for applying a plurality of colors to pile carpeting wherein the carpetingis in roll form and wherein the operation is acontinuousone as distinguished from deep dyeing individual strips.

;A further object of the invention is the provision of 2,984,540 Patented May 16, I QGI "ice drawings, wherein:

Figure 1 is a plan view of the dye carrying portion of the apparatus.

Figure 2 is a sectional view taken on line 2--2 of Figure 1, and showing carpeting in position for immersion.

Figure 3 is an enlarged detail .view showing the pile under compression.

Figure 4 is a similar view showing a fabric of shorter pile with the pile under compression.

Figure 5a is an enlarged detail view of a section of earpeting having a coarse loop construction and prior to mmersion.

Figure 5b is :a similarview after immersion and compression.

Figure 6 is a perspective view of three forms of walls on the dye receptacle.

Figure 7a is an enlarged sectional view of a portion of the dye receptacle.

Figure 7b is a modified form of theconstiuctionshown in Figure .741. I

Figure 7c is a further modification of the construction shown in Figure 7a.

Figure 8 is a further modification showing the provision of an absorbent layer and the pile fabric compressed against said absorbent layer.

Figure 9a is similar to the .form shown in Figure 8 with channels provided in the receptacle bottom. I

Figure 9b is a sectional view taken on the line 9b-.9b of Figure 9a.

Figure 9c is a view similar to the modification shown in Figure 8 with the absorbent material resting on a. layer of wire screen. I

Figure 10 is a sectional view of the/equipment, showing a sheet of resilient material affixed to the underside of the platen.

Figure 11 is a diagrammatieview ofia metering device for feeding coloring material to the dye receptacle.

Figure 12a is a perspective view of a portion ofthe machine showing the manner of feeding individual rugs to the platen.

:Figure 12b is asectiona1 view-taken 0n'.line12b -1 2b of Figure 12a.

Figure 12c isa detailed view showing one manner of removing a carpet section-from the printing form.

Figure 13 is a perspective view of a machineiorpattern dyeinga roll of carpet.

Figure 18 shows three further modifications of the upstanding walls on the dye receptacle.

Figure 19 is a detailed sectional view through a portion of a dye form or receptacle.

Figure 20 is a sectional view of a modified form of machine for applying single colors to carpeting.

Figure 20a is a modification of the machine shown in Figure 20. V

Figure 21 is a perspective view of a portion of the roller shown in Figure 20. Figure 22 is a diagrammatic View of a further modification of a machine useful for applying a single color to carpeting.

Figure 23 is a sectional view through'a printing form showing a different method of feeding coloring material.

Figure 24 is a top plan view thereof. Figure 25 is an enlarged detailed view of a modification of the printing form shown in Figure 2.

An infinite number of varying color designs might be dyed into carpeting by the present invention. For purpose of illustration, Figures 1 and 2 disclose the invention confined to a single design adaptation. The printing form shown in plan view in Figure l and in sectional view in the lower half of Figure 2 is indicated by the numeral 25 and is supported upon a base member 26. The printing form 25 may comprise any number of layers, depending upon the number of colors to be used, but for illustrative purposes is shown as a three layer form. The bottom wall 27 may be of metal, plastic or any suitable material having dimensional stability, moisture resistance, and resistance to the chemicals which may be contained in the coloring agents indicated by numeral 28. Around the outside rim of the bottom wall 27 is glued or otherwise tightly secured a border strip 29 of uniform height and which is strong enough to support the top layers and withstand considerable pressure.

' At certain intervals, spacer columns 30 are secured to the lower wall, such coumns being of the same height as the border strip 29. The columns 30 are strong enough to give support and spaced frequently enough to prevent a second wall 31 placed on top of them from buckling under pressure. The inner wall 31 is secured tightly to the border strip and the spacer columns to form a or other elastic or compressible substances for a purpose which will appear. The outer strip 38 is provided with an inclined gasket 39, and the inner strips 38 define various shaped color receptacles 40. Holes 41 are drilled at frequent intervals through the top wall 37 and through as many intermediate walls as is necessary to reach the desired color level. Into these holes are inserted tubes 42 of suitable length to reach the desired level, such tubes fitting snugly into the holes and coated with a sea ing substance to produce a perfect seal at the points of penetration. It will be noted, as seen in Figure 2. that the upper ends of the tubes are level with the top surface of wall 37. Openings are provided in each of the border strips 29, 32 and 35 to receive tubes 43 which connect each of the compartments with the corresponding color feeding devices to be described.

The top platen which carries the carpeting is shown in Figure 2 and is indicated by the numeral 44. Numeral 45 indicates the hydraulic rams which sets the platen in motion. The platen has attached to its underside a sheet of rubber, felt or other resilient substance 46 to the under side of which the pile fabric 47 is secured by any suitable means. For purpose of illustration, the pile fabric is shown secured by vacuum means. To provide for this means the platen is shown as being hollow with the lower wall perforated and a vacuum hose 48 mounted on the top wall and leading to any suitable vacuum source (not shown).

From the foregoing description, the coloring process is a relatively simple operation. The strata printing form 25 is set on top of the base 26, the tubes 43 are then installed to connect the form with the appropriate color feeding devices, which supply a premeasured quantity of coloring agent to the form by means of gravity flow or pressure feeding devices, the amounts of coloring material being calculated so as to yield the desired level of coloring agent in the receptacles 40. With the carpet 47 affixed to the top platen 44, the top platen is forced down by the hydraulic rams 45 to start the pattern dyeing operation.

Figure 3 shows the carpet pile in a state of compression between the top platen 44 and the surface of the top wall 37 at the bottom of the printing cycle. The dividing walls 38 have fully entered the pile face of fabric 47. As seen in the drawings, these dividing walls are shorter than the pile height of the fabric, causing the fibers to be squeezed and compressed into the coloring agent 28. This pressing and squeezing action forces the coloring agent into the spaces between the compressed fibers, causing them to be evenly and thoroughly impregnated with the coloring agent. The fibers entering the coloring agent displace sufficient volume to force the level of the coloring agent higher as the carpet fibers are compressed into the color receptacle, and the level of the coloring agent, the height of the dividing wall and the pressure exerted by the top platen are calculated in such a way as to cause the level of the coloring agent to rise to the carpet backing, but not beyond it, when the fibers have reached their full state of compression. By adjusting the three factors of color level, wall height and pressure, penetration of coloring agent can now be minutely predetermined, and the relationship between these three factors will also determine the degree of dryness, or wetness, of the fabric as it is being withdrawn from the printing form. A low level of coloring agent, a low wall height and a great deal of pressure will result in a fabric almost dry to the touch upon emergence from the printing form. A high level of coloring agents, relatively high walls and fairly low pressure will result in a fabric quite wet upon emergence. As the wall height approaches the height of pile, and as pressure drops to negligible proportions, no appreciable compression will take place, and penetration becomes increasingly uneven and imperfect. Droplets of excess color stick to the bottom of the pile, and as the wall height rises above the height of the pile, the fabric emerges so unevenly penetrated and so soaking wet, that further processing or fixing of colors becomes impossible without hopelessly smudging the color and ruining the print.

Figure 4 illustrates the advantage of using a rubber or compressible wall 38. To allow for using a given printing form with a variety of different pile heights and fiber densities, the resilient walls 38 are shown under a state of compression. Under the influence of the pressure exerted on the carpet by the top platen, the fibers enter between the rubber walls and compress them to a depth then largely determined by the degree of pressure exerted, rather than by the height of rigid dividing walls. In this manner, one printing form will effectively handle a great variety of fabric constructions.

A further advantage of using a rubber or compressible wall 38 is shown in Figures 5a and 5b. Numeral 50 denotes a carpeting of loop construction made of rather coarse yarn in which the loops may be randomly oriented. This makes it diflicult for the dividing wall 38 to enter cleanly between the fibers, some of the coarse yarns lying over the ridge of the dividing wall. Upon compression of the fiber, illustrated in Figure 5b, the divid- :ing wall 38 acts in effect as a gasket, yielding to the irregularities in the surface and sealing off the color receptacles from each other. Just as important as the gasket effect is the fact that the yielding nature of the rubber permits the carpet to find its own level under uniform pressure across the entire printing area, whereas the accumulation of coarse yarn on the ridge of rigid dividing walls would tend to cause high spots and prevent effective penetration.

The liquid levels in proximity with the dividing walls exhibit the phenomenon of the meniscus, which simply stated is the tendency of the liquid to form an upward are at the .point of contact and literally climb up the side of the walls as shown at 51 in Figure 6a. In circumstances where the liquid level is relatively high in relation to the dividing walls, this presents a problem. Where the meniscus climbs to thetop ridge of the wall,

"there tends to be diffusion of one coloring agent into the other, causing bleeding and lack of definition. In order .to avoid the necessity of making the dividing walls of impractical heights, a barrier is interposed between the meniscus and the top ridge of the dividing wall by means of a head 52 or recess 53 near the top of the dividing wall, as illustrated in Figures 6b and 6c. Whether a head 52 or a recess 53 is to be used depends on the thickness of the dividing wall, the nature of the material of "which it is made, and the surface tension characteristics of the particular coloring agent used.

Since it is necessary to achievefairly thin liquid layers leveling out under the action of gravity on a level surface, another physical phenomenon of liquids, namely surface tension, becomes troublesome. Figure 7a illus trates the emergence of coloring agent 28 from dye-feed- ;ing tube 42 on a perfectly smooth form surface. It illustrates the tendency of the liquid to form a globule above the tube opening held together by the natural surface tension of the liquid which refuses to spread laterally. Only at the point where the height of the globule enables the liquid to overcome its surface tension by increased gravity, does the globule begin to spread laterally, and fill up the color receptacle. In order to counteract this tendency, Figure 7b shows a system of ridging the surface in directions at right angles to each other :so as to produce small, pyramidal protrusions 54. The act of thus breaking up the surface causes the liquid to flow instantly, and to spread widely immediately upon emergence from the color-feeding tube 42. What this device accomplishes is to increase the depth of the color .levelin the low spots and decrease it in the high spots so as to offer a deeper fiowlevel in the valleys while at the same time maintaining the same volume of.liquid per square inch of area. By breaking up the surface at the edge of the globule and offering surfaces of various de grees of steepness to the edge of the flow, it overcomes the action of surface tension by taking advantage of the meniscus phenomenon. For certain low color levels, the application of fine wire mesh to the form surface achieves a similar result by maintaining at all times a liquid level below the surface of the wire which tends to draw the freshly fed coloring agent rapidly to the sides. This is illustrated in Figure 70 at 55. Sand blasting, disc grind- .ing or similar devices create surface effects promoting the rapid flow of coloring agent depending upon the physical nature of the liquid employed, the work-ability of the form surface, and the depth of color level desired.

For certain relatively thin plush fabrics, velvets .or furnishing fabrics, the color level required is so low that lateral gravity flow cannot be entirely relied on even in the presence of the above flow promoting surface characteristics. In this case the form surfaceencompassed .by the dividing walls is lined with felt, sponge or other ab- :sorbent, resilient and compressive material, whichis then soaked with coloring agent by the capillary action ofthe absorbent material drawing the fluid laterally from a rulfficient number of bottom feeding openings was is .neces-' 6 sary to effect uniform saturation. -Upon exerting pressure upon such an absorbent medium, the degree of pressure can be adjusted so as to liberate by compression a sufiiciently deep or shallow level of coloring agent so as to effect the thorough penetration and impregnation of the fabric in question.

Figure 8 shows the form surface 37 from which protrude dividing walls 38 between which the form surface is lined with an absorbent layer 56 soaking up coloring agent through dye-feeding tubes 42. This figure illustrates the compression of thin pile fabric against the absorbent material 56.

Figures 9a, 9b, and 9c illustrate two ways designed to facilitate the rapid wetting of the absorbent layer 56. In the modification shown in Figures 9a and 9b, narrow channels 57 are routed in the form surface 37 radially from the mouth of the feeding tubes 42 in order to bring larger areas of the absorbent layer into direct contact with the coloring material. In Figure 90, a layer of wire mesh 58 or the like is shown interposed between the surface of form 37 and the absorbent layer 56 to permit -a free flow of the coloring agent beneath the surface of the absorbent layer.

Since the backing material of carpeting is often made of rather coarse yarns, and since the loops of tufted carpeting are tufted through the backing material, such backing material often has a very uneven surface of many little bumps and protrusions. If a hard, smooth top platen were applied against such backing material, a lot of small crevices and spaces would be created between the carpet backing and the platen surface. When the pile fabric is compressed into the coloring agent, such coloring agent may be forced through the hacking into these crevices, instead of being entrained among the fibers in order to impregnate them. Figure 10 represents a large cross section through the equipment at the compression stage of the cycle. The top platen 44 is provided with a layer of rubber, felt or other resilient material 59, which engages the irregular carpet backing 60 in such manner as to yield to the high spots and project into the low spots, thus effectively sealing off the pores. of the carpet against undesirable color penetration, and simultaneously aiding in the even exertion of pressure.

Various forms of feeding mechanisms may beemployed for supplying coloring material to the pattern receptacles. The exact nature of the feeding mechanisms depend to a certain extent on the viscosity of the coloring agent used. For very thin, free-flowing solutions, it may be sufficient to maintain constant level reservoirs outside the pattern area, the level of which is held constant by a chicken feed or other mechanism at exactly the same horizontal .level as the color level in the color receptacles. Since the-differential level between reservoir and color receptacle is, at the start of flow, quite small and approaches zero as the color receptacle 'fills to the desired level, the rateof flow is relatively slow. In order to obtain a :more efiicient flow, a color metering device is employed which meters out a pre-determined coloring agent sufficient to refill all the color reservoirs of that particular color "for 'each printing cycle. This metering device is supported 'on a table of adjustable height, so that the feeding device :can

be raised sufficiently above the level of the color'receptacles to create additional gravity force to speed'thefiow of coloring agent. Since the exact quantity for each cycle has been predetermined, the coloring agent tends to level itself out through the intercommunicationof :color receptacles of the same color in the color strata of :the multi-level form. The feeding device is raised or lowered according to the speed of flow desired.

Referring to Figure 11 which diagrammatically-illustrates an efiicient form of metering'device, numeral 1 61 discloses a large color supply tank filled'with acoloring agent 28. The coloring agent is fed to :the metering device through apipe 62controlled bya solenoid valve 63. The metering device comprises "a cylinder 64,- within second rod 70 of a height equal to the full extended height of rod 66. To the rod 70 are attached two adjustable clamps 71, each having protrusions 72 mounted in such manner as to engage activating button 73 of microswitch 69. The relative positions of clamps 71 determine the limit upper and lower positions of the micro-switch 69. The coloring agent 28 flows from the metering device to the printing form through tube 43, past solenoid valve 74.

The entire metering device is supported on an adjustable table 75.

During a typical printing cycle, coloring agent flows out of the full metering device through tube 43 until float 65 has fallen sutficiently for lower projection 72 to engage micro-switch 69 at which moment solenoid valve 74 is closed by the action of micro-switch 69, stopping flow of the coloring agent. When all of the metering devices employed for a particular pattern have completed their downward stroke, and all solenoid valves 74 are closed, top platen 44 is activated on its downward movement to compress the carpet into the printing form while simultaneously all solenoid valves 63 are opened to permit a new charge of coloring agent to flow into cylinders 64 of the metering devices. As the liquid level rises within the cylinder, it lifts fioat 65 until micro-switch 69 engages the upper projection '72 to shut off solenoid valve '63. As soon as platen 44 is raised to its upper position and has lifted the carpet from the printing form subsequent to compression, it trips a micro-switch which opens solenoid valve 74, permitting color to again flow into the coloring receptacle. This cycle is repeated for each printing operation. The entire operation is electrically synchronized between micro-switch 69, solenoid valves 63 and 74 and movement of the platen 44. The speed of the cycle is determined by the rapidity with which the coloring agent flows into the receptacles, the actual duration of the compression of the carpet in the printing form being almost instantaneous. Synchronized with the above cycle is the feeding of fresh carpeting material into the printing equipment.

While a specific form of metering device has been shown and described, other means such as positive metering pumps can be employed for feeding a predetermined amount of coloring material under a controlled pressure.

For printing individual rugs, as distinguished from carpeting in roll form, reference is had to the apparatus shown in Figures 12a, b and c. In this form of apparatus, the platen 76 includes a hollow perforated plate 77 to which a vacuum hose 7 8 is connected. Runners 79 are secured to the platen 76 by means of brackets 80 and support the rollers 81 carried by the vacuum plate 77. The bottom platen is indicated by the numeral 82 and supports the printing form 83. A lifting table 84 is raised or lowered by a hydraulic plunger 85 and is shown supporting a carpet 86, face downward. In operation, the hollow plate rolls out to the feed side above the hydraulic table which presses the carpet back against the vacuum plate. The vacuum exerted through the holes in the vacuum plate securely holds the carpet against it with the pile face down. The hollow plate is then moved on its rollers into the top platen which descends upon the printing form 83 and performs the printing operation. The platen is then lifted and the plate rolled to the other side for removal of the printed carpet. The plate is then shuttled back to the feed side to receive a fresh carpet from the hydraulic table. The runners on which this plate moves, being attached to the top platen, ride up and down with the top platen during the printing step.

When the top platen has compressed a large area of carpeting into the printingforrn surface, it has in the process of compression, expelled much of the air out of the color receptacle and creates upon rising a suction between the carpeting and the color receptacle which is undesirable. To correct this situation, the vacuum plate carrying the carpet, or the top platen, may be made in two parts as seen in Figure 12c with the bottom part 87 hinged to the upper part 88 by a hinge 89, with the other side of the bottom part separable from the upper part by a piston or plunger 90. Thus, instead of the vacuum plate or top plasten moving upwards from the printing form completely parallel with it, the carpet is peeled from the form by reason of the hinged arrangement.

Figure 13 illustrates a complete assembly of equipment for pattern dyeing a carpet in roll form as distinguished from short lengths of carpeting. The printing form. 91 is set onthe bottom platen 92 of a fiat bed down-acting or up-acting hydraulic press. The top platen 93 rides up and down on posts 94 and is activated by hydraulic ram 95. A roll 96 of fresh carpeting is mounted on supports 97 attached to the feed side of the top platen. The carpet 98 is then fed over pin roller 97a, provided with a torque clutch, between the sheet of resilient material 99 on the underside of the top platen and the printing form 91 over pin roller 100 to take-up roll 101, both rollers being held by supporting beams 102 attached to the top platen 93. The force drawing the carpet through the printing machine is exerted by pin roller 1% against the resistance of a slipping clutch or other torque device on pin roller 97a resisting the unrolling of carpet roll 96. Between the negative action of the slipping clutch on pin roller 97a and the positive pull of pin roller 100, the carpet is stretched so tightly as to cling to the bottom of the top platen. The movement of take-up roll 101 is governed by a slipping clutch so that the moist carpeting may be rolled up under steady but light tension.

As previously pointed out, in order to counteract suction on the carpet on parting from the printing form, the upper platen can be hinged as in Figure 12c, or the carpet can be relaxed between the two tension rollers 97a and 100, by having suitable mountings for these rollers permitting retraction of the rollers into the platen to provide slack. Small lateral slots may be provided in the upper platen to give air free access to the back of the carpet and promote easy separation. Thus, a slight loop is formed under the tension of the slack fabric, causing separation of the carpet from the form from both sides with the center portion the last to be parted from the form. As soon as the carpet has fully parted from the form, the tension rollers are again extended the full distance from the platen, and the carpet remains under tension until the next parting.

The color levels of the printing form are connected by tubes 43 to the color metering devices 64 supported on the adjustable table 75. The color metering devices are connected to the color storage tanks 61 by tubes 62, said tanks being supported above the top of the metering devices by a stand 103 in order to permit color to flow freely into the metering devices under the force of gravity.

During a typical printing cycle, platen 93 descends until carpet 98 is compressed into form 91. As the platen rises to part the carpet from the printing form, it trips a limit switch which not only causes the metering devices 64 to discharge a fresh quantity of coloring agent into the printing form but also activates a motor 164 driving pin roller 109 to feed fresh carpeting into the machine from carpet roll 96. The forward motion of the carpet is halted exactly at the point where the rear edge of the print in the carpet coincides with the front edge of the form thus exposing fresh carpet above the printing form to receive another repeat print. The feeding of the carpet takes place during the upward and downward motion of the platen, and the speed of the equipment is so gauged that the feeding of new carpet is completed by the time the downward motion of the "95 platen" again'engages the carpet with the printing patternl The construction of the printing form must be adjusted when the viscosity of the coloring agent is too high to flow freely under gravity or when the number of colors contained in the pattern is so large and individual color areas of some of these colors so small in relation to overall pattern that construction of a device with perhaps as many as fifteen or twenty-five color levels as illustrated in Figure 2 would be impractical.

For coloring agents of high viscosity, reference is had to Figure 15 wherein a suitable form is illustrated. The dividing walls 38 are embedded in a plastic or other suitable sheet 105 which forms the printing surface. Beneath thissheet are glued or otherwise secured a plurality of support strips 106 which follow in outline subetantially the pattern made on the surface by dividing Walls 38. Against the opposite edges of these support strips 106 is then glued or secured a sealing sheet 107 and around the outside, between the sheets 105 and 107, are placed border strips similar to border strips 29 shown in Figure 2. The sealing sheet 107 is supported by columns .108 spaced at sufliciently close intervals not to permitbuckling of the top sheets under pressure, but high enough. and widely spaced enough to permit color feeding tubes 109 to be introduced between them. This whole assembly rests on a strong bottom sheet 110. The support strips 106 serve to provide color cavities 111 corresponding substantially in shape to the color receptacles 1.12 on the surface. A large number of small holes 113 are provided in sheet 105 to connect color receptacle 112 with color cavity 111. Into sealing sheet 107, one or more large holes are then drilled into which are set short length of tubing 113. To these tubes are attached tubes 109 which connect the color cavities with color feeding devices. Between the printing form shown in Figure 15 and the color feeding devices (not shown), Short lengths of flexible tubing 115 are inserted, which can all be simultaneously closed off by being compressed -bythe action of pinch bar 116 activated by a cam 117, as seen in Figure 14.

The purpose of this shutting oif device is the simultaneous blocking of all color feeding tubes 109 when the carpet is being compressed into the color receptacles :112, since without such shutting oif, the color would tend to be forced back into the feeding devices through tubes 109 by the action of the carpet squeezing the coloring agent out of the color receptacles through holes 113. This same purpose is accomplished in Figure 11 by the simultaneous closing of all solenoid valves 74. The special closing device of pinch bar 116 in close proximity to the printing form is here necessitated by the fact that tubes 109 leading into the printing form must need be of flexible nature to enter freely in between support columns 108. Such flexible tubing tends to expand along its entire length back to the color feeding devices. Since each color receptacle 112 is now separately fed, it can be efficiently fed with viscous coloring agent of a premeasured quantity by the positive pressure exerted by metering pumps or similar devices. This pressure forces the viscous coloring agent evenly through the closely spaced holes 113 requiring a minimum of lateral flow on the. printing surface. Whereas the printing form in Figure 2 requires a metering device for each color, the printing form in Figure 15 requires a metering device for each color area. .A battery of metering pumps which are freely adjustable over a wide range of feeds (and which are commercially freely available), has tubes 109 of suflicient lengths attached to each pump. These tubes are then temporarily connected to the particular printing form in the machine and color feeding tubes attached to the pumps from appropriate color storage tanks. When changeover is made to a different printing form, tubes .109 are removed from the tube ends 113, flushed out and connected to the tube ends 113 of the new printing form. 2 In Figures 16 and 17 are illustrated a printing form suitable for printing designs in a great number of colors, .or.designs on which thereare small color accents of different colors on large colored grounds. Dividing walls 38 are set into a very thick sheet of plastic or other preferably transparent material. On the bottom of this thick sheet 118 are outlined the position of channel strips 119. The color areas on the surface are indicated by the code letters of the color they are to receive. Similarly the channel spaces on the bottom of the sheet 118 are indicated by the code letters of the coloring agent they are to carry. Wherever a color channel is laterally so far removed from the color receptacle on top which it is to feed that it could not be reached by angularly drilling through the thick sheet 118, a channel 120 is routed out of the bottom of sheet 118 leading from the channel space carrying the desired color to a spot underneath the surfacecolor receptacle which is to receive that color. When all the necessary channels 120 have been routed, a sealing sheet 121 is glued to the bottom of sheet 118. Holes 122 are now drilled to these routed channels 120 at the spots where they are just above a suitably numbered bottom channel space 123. These bottom channel spaces 123 are formed by channel strips 119 glued or secured to transparent sealing sheet 121 to coincide with their position previously indicated on the bottom of sheet 118. -A bottom sheet 124 is then attached to the bottom of channel strips 119, forming the channel spaces 123. Now holes 125 are drilled straight or at an angle down to the corresponding channel space through sheet 118, being careful not to drill through any routed channels 120. Then holes 126 are drilled into the routed channels 120 being careful not to penerate the sealing sheet 121 into the channel spaces below.

By feeding. the appropriate coloring agents into the channel spaces 123, all color receptacles on top will now receive their proper coloring agent regardless of whether or notthey happen to be located directly above the proper channel space 123. The channel spaces need of course not carry coloring agent in symmetrical order and any channel space can be assigned any color that happens to be needed in the vicinity of the channel. In this manner, any spot on the surface can be serviced by any of twenty-five colors or more, and in certain designs having small color areas on larger grounds, this system can be used of course in conjunction with the strata method shown in Figure 2.

An effective way of feeding channel spaces 123 is to have top sheet 118 extend beyond the printing pattern in the direction of channel strips 119. Color boxes can then be built across the sheet, making the wall any desired height, the bottom of these boxes being that same sheet 118. Within these boxes containing each a separate color, holes are simply drilled through sheet 118 into all the channel spaces 123 which are to carry that particular color. These color boxes in turn are fed by color metering devices.

The upstanding walls forming the dividing walls of the color receptacles may be of any shape, or of any degree of hardness or softness. The structure depends on whether the fabric into which they are to enter is dense -or sparse, coarse or fine, and they may be thin or ribbonlike, pyramidal, concave, convex or semi-circular. For certain sparse fabrics it is necessary to use a pyramidal wall with a rather wide base in order to avoid overcoloring the material in proximity to the dividing wall, as shown at 127 in Figure 18a. In order to faciliate compression of the wall when made of rubber or similar material, the wall may be hollow in order to permit the tip of the wall to collapse into its center, as shown at 128 in Figure 18b.

Where very thin dark lines are desired around color areas in the print in order to improve definition of the design, these can be achieved by having rather blunt top edges on the dividing walls, as shown at 129 in Figure 180. A print roller coated with a generous layer of viscous coloring agent is rolled across the printing form, wetting the top of the ridges with coloring agent 130. When the carpet is printed it picks up suflicient coloring from the top of the ridge as it passes into the'color receptacles and will give the final print on the carpet very thin, but well defined outlines.

An additional device to prevent the meniscus action of the liquid coloring agent from causing the liquid to climb to the top of the dividing walland diffuse into adjacent receptacles consists in taking a water repellant substance such as wax or silicones and coating the top edge of the dividing walls with such a substance by running a print roller coated with it across the printing form in a manner similar to that outlined above for application of thin lines. The repellant substance stops the meniscus and assures greater definition. Figure 120 discloses one method of breaking the vacuum in removing the'carpeting from the printing form. An alternative form is shown in Figure 19 wherein each color receptacle may be provided with a very thin air tube 131 penetrating through the color form, to be fed with air from below and projecting only very slightly above the bottom of the color receptacle. As the top platen begins to rise, lifting the carpet out of the receptacles, compressed air is shot into the color receptacles through these small tubes counteracting the vacuum created by the suction. Should any dye stuff have entered the air tube during compression of the dye stuff by the carpet, the volume will be so small that its spurting up under the influence of the air will not even show on the fabric.

For single color application the process is adapted to a rotary method. A large number of small contiguous color receptacles are formed by thin upstanding wails 'ma'de preferably of rubber on a rubber sheet. A roller is then covered with this, sheet, or the walls directly formed on a roller with a rubber or other suitable surface. The size of these individual receptacles so formed is large enough to permit free entry of viscous coloring 'agent into them when the bottom of the roll passes through the coloring agent, but not so large as to permit the coloring agent to run out of the receptacle by gravity when passing upward on the roll toward the pile fabric to be dyed.

Referring to Figures 20 and 21, numeral 132 designates the rubber walled color paste holder provided with an upstanding wall 133 forming color receptacles similar to the color receptacles previously described. This holder may be mounted on a roller 134 which is partially immersed' in a color container 135 holding color material 136. Numeral 137 designates an adjustable doctor blade which can be held perfectly level with the top of the walls in order to fill the individual color receptacles flush with color, or it can be adjusted to exert a slight squeezing action on the rubber walls, in-order to fill the color receptacles only partially, The carpeting indicated by numeral 138 is fed with its pile downward over roll 134 under pressure exerted against'its back by a squeeze roll 139. In order to avoidair bubbles being entrained in the color receptacles on member 132, when these receptacles enter the viscous coloring agent, resilient roller 140 presses against the rubber walls at their point of entry into the coloring agent, compressing and collapsing these walls and expelling all air so that when the rubber walls become upright again they do so underneath the color level and freely receive color without entrainment 'of air A doctor blade 140a, supported by the container 135, bears against the roll 140 to keep same clean.

As carpet 138 is pressed into the color receptacles by the action of pressure roll 139, the rubber walls enter 'between the fibre, the fibres are compressed into the "color receptacles, which are empty of color when the carpet leaves the receptacle, having contained just enough "color to uniformly penetrate and impregnate the fibres.

of the coloring material.

The walls atthe same time prevent any lateral shift or back squeezing of the coloring agent, resulting in a perfectly even uniform coloring action and a perfect consistency and uniformity of fabric color regardless of the length of the run. Since the amount of coloringagent introduced into the fibres is so precisely pre-determined by the formula of the coloring agent and the setting of the doctor blade, and the complete emptying of the color receptacleby the fibre as the fibre passes into and out of the receptacle under compression, identical colors 'can be achieved even in runs that are weeks apart.

Figure 20a discloses a modification of the apparatus disclosed in Figure 20. The printing roller 141 is similar to the roller 134 but instead of a color container 135 for furnishing the coloring agent to the printing surface, the coloring agent is provided through a nozzle 142 be"- tween the squeeze roller 143 and a doctor blade 144'. The receptacle 14S serves as a catch basin for excess coloring material. t

Figure 22 discloses a modification of the adaptation described in Figures 20 and 21 but in place of the toilet 134, an endless belt 146 can be employed. This endless belt includes upstanding walls similar to walls '133'to form color receptacles for reception of the coloring agent. The endless belt is movable along the upper surface of stand 147 and rotated about rollers 148 and 149. The carpeting 150 is lead off the roll 151 over a roller 152 under the pressure roller 153 over pin roller 154 to take-up roll 155. The stand 147 is cut out at 156 to receive an idle roller 157 which projects slightly above the surface of the stand 147 and cooperates with the pressure roller 153 to compress the carpeting against the color receptacles in the belt in the same manner as previously described. The coloring material 158 is fed to the color receptacle through a color feed tube 159. suction tube 160 is provided to remove the coloring material when desired. A doetor blade 161 and roller 162 may be provided similar to the doctor blade 137 and roller 140 shown in Figure 20. A feature of this arrange ment is the fact that the endless belt can be led back underneath the printing surface 147 through a washing chamber 163, operating through a water spray 164 and dried by air pipe 165. Thus, the endless belt is returned to the color feeding side clean and ready to receive a new charge of a different coloring agent.

Figures 23 and 24 disclose a modified form of printing form which is adaptable to use with a thin bodied coloring material where it is desired to provide continuous agitation of the material and thus preventing sedimentation. The printing form 166 shown in Figures 23 and 24 is similar to the multi-layer form 25 shown in Figure 2.

However, the tubes 43 of Figure 2 are replaced by a widetacles 169 supported on an adjustable platform 170.

The overflow receptacles consist of upstanding walls 171 and a longitudinal partition 172, the upper edge of which terminates below the walls 171, and forms a channel 173 to receive the overflow from the nozzles 168. Catch basins 174 and additional tubes 176 extend from the catch basins to return the overflow material to the source of supply.

As seen in Figure 23, the platform is adjusted with respect to form 166 whereby the upper edge of partition 172 is at a point corresponding with the desired height of the color level in the printing form. Thus, with this arrangement, the color level is always maintained at the desired height by a continuous flow of the coloring material and the continuous flow assures constant agitation The mechanism shown in Fig ure 14 may be employed to shut off flow during a printing operation.

Figure 25 discloses a modification of the printing form ofFig'ure 2 whereby agitation of the coloring material may be provided in a simple manner. In Figure 2, the walls 27, 31, 34 and 37 are maintained in spaced relationship by columns 36. .As shown in Figure 25, the columns are replaced by partitions 177 having cut-outs 178 at their lower edges. Thus, the coloring material passes through the lower portions of the partitions and promotes agitation of the coloring material.

The mode of operation of the various modifications disclosed will be readily apparent. While we have disclosed and described various embodiments of the present invention, it is apparent that minor changes and further modifications may be made therein without departing from the spirit of the invention, as defined by the claims. While we have disclosed a down-acting press, in dyeing or printing large sized carpeting, it may be desirable to employ an up-acting press since the present inventive concept is adaptable to either type of press. Instead of pin rollers tensioning the carpet between the platens, this may also be achieved by having an endless belt pass between the platens and over the top platen, such a belt suitably supported on rollers, against which the carpet unrolling from the feed roll is pressed and secured by means of adhesive substances, such adhesive substance being of a nature to permit the carpet to be peeled from the belt to the take-up roll.

The pattern dyeing technique outlined above can easily be adapted for use with relatively fiat fabrics and shallow pile fabrics through an offset method in which case a piece of carpeting, or any other suitable absorbent medium, becomes the offset plate which absorbs the dye stuff from the color receptacles of the printing form and then transfers it to other fabric by being pressed against it, releasing some of the dye stuff contained within it.

Thus, a plate carrying a piece of carpeting, or absorbent medium, can shuttle between two hydraulic presses, or other suitable devices, receiving dye stuff from the printing form in one press and transferring it to other fabric in the second press to which it has been shuttled on runners, or by any other convenient means.

The printing medium, whether carpet or other absorbent substance, can also be attached to the under side of a free swinging printing plate, supported by two pivoted beams which pivot the plate from the printing form to the fabric to be printed, above which are convenient means for exerting controlled pressure on the printing p ate.

Having thus described the invention, what is claimed is:

1. In a process of applying a coloring agent to a fabric having pile on one face thereof wherein an area of pile on the face of the fabric is introduced into a receptacle having upstanding side walls and containing a coloring agent in liquid form and the side walls of the receptacle are brought into engagement with the fabric at the base of the pile by exerting pressure evenly against the back of the fabric, the improvement which comprises forcing the pile endwise against the bottom of the receptacle and compressing the pile within the receptacle to a flattened condition in a measured amount of the liquid coloring agent contained therein by continued pressure against the back of the fabric and then releasing the pressure on the fabric and the pile whereby substantially all of the measured quantity of coloring agent in the receptacle is absorbed by the pile.

2. In a process of applying a coloring agent to a pile fabric, the improvement as defined in claim 1 wherein the side walls of the receptacle are substantially shorter in height than the height of the pile.

3. In a process of applying a coloring agent to a pile fabric, the improvement as defined in claim 1 wherein the side walls of the receptacle are resilient and are reduced in height in compression of the pile by the pressure exerted on the back of the fabric.

4. In a process of applying a coloreddlesign to a pile fabric wherein a pile fabric having pile on one face thereof is supported above a plurality of open receptacles forming a pattern, each of said receptacles having upstanding side walls and containing a liquid coloring agent, with the pile facing said receptacles and discreet areas of the pile are introduced into the respective receptacles by exerting pressure against the back of the fabric until the walls of the receptacles are brought into engagement with the fabric at the base of the pile, the improvement which comprises, compressing the pile in the respective receptacles to a flattened condition against the bottoms thereof and in a measured amount of the coloring agent in each of the receptacles by the exertion of pressure on the back of the fabric and then releasing the pressure on the back of the fabric and the pile with substantially all of the coloring agent in each of the receptacles being absorbed by the pile therein upon the release of pressure therefrom.

5. In a process of applying a colored design to a pile fabric, the improvement as defined in claim 4 which includes removing the pile from the receptacles and advancing the fabric in a lengthwise direction for a distance equal to the length of the pattern before exerting pressure a second time on the back of the fabric.

6. In a process of applying a colored design to a pile fabric, the improvement as defined in claim 4 wherein the receptacles have resilient side Walls and said side walls are reduced in height during compression of the pile in the receptacles.

7. In a process of applying a colored design to a pile fabric, the improvement as defined in claim 4 wherein the side walls of the receptacles are substantially shorter in height than the pile and permit the pile to be fully compressed within the respective receptacles.

8. The process of applying a coloring agent to a fabric having pile on one face thereof in which pile on the face of the fabric is introduced into a receptacle having upstanding side walls and containing a coloring agent and the side walls of the receptacle are brought into engagement with the fabric at the base of the pile by exerting pressure on the back of the fabric which is characterized by compressing the pile to a flattened condition against the bottom of the receptacle in a measured amount of the coloring agent by applying pressure to the back of the fabric, said pressure being applied to the back of the fabric by a pair of opposing platens with the upper platen of said pair acting on the back of the fabric, then releasing the pressure applied to the back of the fabric and removing the pile from the receptacle with substantially all of the coloring agent therein being absorbed by the pile upon the release of the pressure applied to the back of the fabric.

9. The process of applying a coloring agent to a fabric having pile on one face thereof in which pile on the face of the fabric is introduced into receptacles having upstanding side walls and each of which contains a coloring agent and the side walls of the receptacles are brought into engagement with the fabric at the base of the pile by exerting pressure on the back of the fabric which is characterized by compressing the pile against the bottom of the receptacle in measured amounts of the coloring agent by exerting pressure on the back of the fabric, said pressure being applied to the back of the fabric by passing the fabric between a pair of pressure rolls, the lower roll of said pair of rolls presenting a plurality of the receptacles containing the coloring agent, said receptacles being formed with resilient side walls, said resilient side walls engaging with the fabric at the base of the pile and permitting the pile to be compressed against the bottoms of said plurality of receptacles in passage of the fabric between said pair of rolls.

10. In a process for dyeing a pile fabric such as carpeting having pile of a resilient and absorptive material on one face thereof, the improvement which comprises com- 15 pressing the pile to a flattened condition against the bottoms of a plurality of open'receptacles each of which has upstanding side walls and contains a measured amount of a coloring agent, said pile being compressed only once in said receptacles by applying pressure to the back of the fabric With the side walls of the receptacles being in engagement with the fabric at the base of the pile, then releasing the pressure from the back of the fabric and removing the pile from the receptacles with sub- References Citedin the file of this patent 7 stantially all of the coloring agent in each of the recep- 10 2,816,811

UNITED STATES PATENTS Becke Apr. 30, 1912 Firsching Aug. 23. 1932 Hasbrouck Oct. 16. 1934 Soriano Nov. 22, 1938 Tillett Dec. 17, 1957

Claims (1)

1. 8. THE PROCESS OF APPLYING A COLORING AGENT TO A FABRIC HAVING PILE ON ONE FACE THEREOF IN WHICH PILE ON THE FACE OF THE FABRIC IS INTRODUCED INTO A RECEPTACLE HAVING UPSTANDING SIDE WALLS AND CONTAINING A COLORING AGENT AND THE SIDE WALLS OF THE RECEPTACLE ARE BROUGHT INTO ENGAGEMENT WITH THE FABRIC AT THE BASE OF THE PILE BY EXERTING PRESSURE ON THE BACK OF THE FABRIC WHICH IS CHARACTERIZED BY COMPRESSING THE PILE TO A FLATTENED CONDITION AGAINST THE BOTTOM OF THE RECEPTACLE IN A MEASURED AMOUNT OF THE COLORING AGENT BY APPLYING PRESSURE TO THE BACK OF THE FABRIC, SAID PRESSURE BEING APPLIED TO THE BACK OF THE FABRIC BY A PAIR OF OPPOSING PLATENS WITH THE UPPER PLATEN OF SAID PAIR ACTING ON THE BACK OF THE FABRIC, THEN RELEASING THE PRESSURE APPLIED TO THE BACK OF THE FABRIC AND REMOVING THE PILE FROM THE RECEPTACLE WITH SUBSTANTIALLY ALL OF THE COLORING AGENT THEREIN BEING ABSORBED BY THE PILE UPON THE RELEASE OF THE PRESSURE APPLIED TO THE BACK OF THE FABRIC.

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