摘要:
A coating device is provided, in which a coating layer of uniform thickness can be steadily formed with high accuracy over a long time on the surface of a base-web material without being affected by the thickness irregularities of the base-web material itself.
摘要:
A method and apparatus for coating a moving paper or paperboard web (1), in which coating mix is applied to the surface of the web (1) by means of a rotating applicator roll (11). The coating mix applied to the web (1) is levelled with the help of smoothing means (4, 5, 6) acting against a backing roll (8). The web (1) to be coated is presses against the applicator roll (11) with the help of an endless band (2), which is adapted to pass over at least the applicator roll (11), the backing roll (8) and an adjustment roll (10) placed upstream of the applicator roll so that the band (2) with the web (1) backed by the band (2) are together deflected to pass over the applicator roll (11) along their path between the adjustment roll (10) and the backing roll (8).
摘要:
An apparatus for coating a web by contact with a transfer roll partially immersed in a reservoir of coating material and rotated into resin-transferring contact with the web on a first main web surface thereof. The web in passage away from the transfer roll is contacted on a second main surface of the web, the second main surface being opposite the first main surface of the web, by a medial main cylindrical portion of a stepped squeegee roll comprising a medial main cylindrical portion of a first relatively smaller diameter, and marginal shoulder portions each of a second relatively larger diameter in relation to the diameter of the medial main cylindrical portion. The stepped squeegee roll is tensionally biased toward, but in spaced relationship to the transfer roll, being maintained in tensionally biased relationship by spring or other tensionally biasing means, to limit the coating material thickness on the web.
摘要:
A coating device includes a transfer roller communicating with a bank of coating material and engaging a web of material to be coated, a squeegee bung mounted to resiliently press against a periphery of the transfer roller and to define a contact surface across which the coating material flows, and a counter roller provided with an air blade for final dosing of the coating material applied to the web.
摘要:
An apparatus for applying spaced apart discontinuous stripes of a fluid to the surface of a moving web. The apparatus includes a rotating applicator roll partially immersed in a bath of the fluid. A notched doctor blade in contact with the surface of the roll removes fluid from the surface of the roll except in the region of the notches to form spaced apart circumferential beads of the fluid on the surface of the roll. The moving web partially wraps the applicator roll where the beads are formed, but is travelling between 20 to 200 times the speed of the surface of the applicator roll, which results in a relatively even distribution of the fluid, in the form of a discontinuous stripe, on the surface of the web.
摘要:
An apparatus for coating moving sheets with a contact adhesive, which apparatus includes rollers for forming a contact adhesive film and rollers for applying the film to a moving sheet, which application rollers include a cooling roller with an adhesive-rejecting envelope or sleeve, a processing roller, and a pivotal support for the pressing roller.
摘要:
Apparatus for pivoting a tensioned web of material away from an adhesive applicator roller therefor comprises a guide roller for the web carried by first pivotal levers and a web tensioning bar extending parallel to the guide roller and carried by second pivotal levers so as to keep the web under tension when the first pivotal levers are swung to move the web past over the guide roller away from the applicator roller. Means are provided which are operative on pivoting of the first levers and which utilize the pivoting motion thereof for controlling pivoting movement of said second levers required to maintain or increase the tension in the web.
摘要:
A METHOD OF PRODUCING A LAMINATED PRODUCT, FOR EXAMPLE, A FABRIC, IN WHICH ONE WEB OF A FABRIC IN PROPERLY STRETCHED AND WRINKLE-FREE CONDITION IS BROUGHT INTO ENGAGEMENT WITH AN ADHESIVE ROLL CARRYING A SMALL METERED AMOUNT OF ADHESIVE, A STRINGING EFFECT IS PRODUCED AS THE FABRIC LEAVES THE SURFACE OF THE ADHESIVE ROLL, CREATING A DEFINABLE ADHESIVE STRUCTURE ON THE FABRIC, THE FABRIC IS TRANSFERRED TO A ROTATING ROLL WHICH MAINTAINS THE FABRIC IN PROPERLY STRETCHED, WRINKLE-FREE CONDITION, LEAVING EX-
POSED A SUBSTANTIAL AREA OF THE ADHESIVE FOR REMOVAL OF SOLVENT AND RELEASE OF VAPORS, THE WEB IS BROUGHT INTO PRESSURE CONTACT WITH ANOTHER FABRIC WEB TO WHICH IT IS TO BE LAMINATED, AND THEN THE LAMINATE IS CARRIED AROUND AND HELD AGAINST A DRUM FOR FURTHER REMOVAL OF THE SOLVENT AND TO KEEP THE FABRIC WEBS PRESSED TOGETHER FOR A PERIOD OF TIME AFTER LAMINATION.