US3889018A — Method of simultaneously coating the opposite sid…

Claim 1

Independent Claim 185 words

The method of simultaneously coating the opposite sides of a paper web comprising the steps of: a. applying a layer of coating material to the opposite sides of the web; b. feeding said coated web along a predetermined path; c. engaging said coated web, as it moves along said predetermined path, by a pair of flexible metering blades disposed and aligned on opposite sides of the web, each said blade extending freely at an acute angle relative to the plane of the coated web in the direction from which the coated web is approaching the the blades, each said blade having a generally flat beveled working face where it engages the coated web; and d. simultaneously applying equal and opposed pressure against aligned opposite sides of the coated web over an area defined by the width of the web and a distance along its length as it moves along said predetermined path by urging said blades toward each other with a force sufficient to establish and maintain at least a partially flush engagement of said working faces with the opposite sides of the coated web.

Claim 2

Independent Claim 185 words

The method of simultaneously coating the opposite sides of a paper web comprising the steps of: a. applying a layer of coating material to the opposite sides of the web; b. feeding said coated web along a predetermined path; c. engaging said coated web, as it moves along said predetermined path, by a pair of flexible metering blades disposed and aligned on opposite sides of the web, each said blade extending freely at an acute angle relative to the plane of the coated web in the direction from which the coated web is approaching the the blades, each said blade having a generally flat beveled working face where it engages the coated web; and d. simultaneously applying equal and opposed pressure against aligned opposite sides of the coated web over an area defined by the width of the web and a distance along its length as it moves along said predetermined path by urging said blades toward each other with a force sufficient to establish and maintain at least a partially flush engagement of said working faces with the opposite sides of the coated web.

Claim 3

Dependent Claim 38 words

The method of coating a paper web as defined in claim 1 further characterized by applying said pressure against the aligned opposite sides of said coated web in a direction urging said web along its path of movement.

Claim 4

Dependent Claim 40 words

The method of coating a paper web as defined in claim 2 further characterized by feeding said web along a predetermined path extending in a vertically upward direction after said layer of coating is applied to the opposite sides thereof.

Claim 5

Dependent Claim 184 words

A process of coating a paper web which comprises moving a paper web with web coating on each face through a path that includes a straight portion, and at that straight portion passing said web between yieldable opposed blades, one blade engaging and extending across one of the coating-carrying surfaces, and the other blade engaging and extending across the other coating-carrying surface, each blade extending to a location spaced from the surface it engages, and being held at that location so that it is positioned for the web to approach it at an acute angle, each blade having a generally flat beveled working face where it engages the coatingcarrying web; pressing said blades against each other on opposite sides of the coating-carrying web with a continuously applied equal and opposed force sufficient to maintain said blades in flexed position and to maintain at least a partially flush engagement of said working faces with the opposite sides of the coating-carrying web to meter and smooth the layer of coating carried by the opposite sides of the web; and drying the smoothed coatings on the web.

Claim 6

Dependent Claim 184 words

A process of coating a paper web which comprises moving a paper web with web coating on each face through a path that includes a straight portion, and at that straight portion passing said web between yieldable opposed blades, one blade engaging and extending across one of the coating-carrying surfaces, and the other blade engaging and extending across the other coating-carrying surface, each blade extending to a location spaced from the surface it engages, and being held at that location so that it is positioned for the web to approach it at an acute angle, each blade having a generally flat beveled working face where it engages the coatingcarrying web; pressing said blades against each other on opposite sides of the coating-carrying web with a continuously applied equal and opposed force sufficient to maintain said blades in flexed position and to maintain at least a partially flush engagement of said working faces with the opposite sides of the coating-carrying web to meter and smooth the layer of coating carried by the opposite sides of the web; and drying the smoothed coatings on the web.

Claim 7

Dependent Claim 31 words

A process according to claim 4 further characterized by moving the web with wet coating material on each face in an upward, vertical direction through the straight portion of said path.

Claim 8

Dependent Claim 38 words

A process according to claim 4 further characterized by moving the web with wet coating material on each face at a speed in the range of from below 600 ft. per minute to above 1,400 ft. per minute.

Claim 9

Dependent Claim 59 words

A process according to claim 4 further characterized by moving the web with wet coating material on each face between flexible plastic blades each of which is of the order of about 1/4 to about 1/2 inch in thickness and is tApered back at the rearward edge of said working face at an angle to form a blunt tip.

Claim 10

Dependent Claim 29 words

A process according to claim 4 further characterized by moving the web with wet coating material on each face at a speed in excess of 1,400 ft. per minute.

Claim 11

Dependent Claim 27 words

A process according to claim 4 further characterized by moving the web with wet coating material on each face at a speed below 600 ft. per minute.

Claim 12

Independent Claim 148 words

The method of simultaneously coating the opposite sides of a paper web comprising the steps of a. moving the web in a predetermined path that includes a vertical, straight portion in which the web moves in an upward direction; b. in a lower region of said straight portion applying to and establishing on each of the opposite sides of the upwardly moving web a layer of wet coating material; c. in a higher region of said straight portion simultaneously applying equal and opposed pressure against aligned opposite layercontaining sides of the upwardly moving coated web by passing the coated web between the rectangular nip of a pair of opposed downwardly extending flexed blades with beveled working surfaces pressed toward each other and extending across the width of the web; and d. in a still higher region of said straight portion drying the resulting smooth coatings on the web.

Claim 13

Independent Claim 148 words

The method of simultaneously coating the opposite sides of a paper web comprising the steps of a. moving the web in a predetermined path that includes a vertical, straight portion in which the web moves in an upward direction; b. in a lower region of said straight portion applying to and establishing on each of the opposite sides of the upwardly moving web a layer of wet coating material; c. in a higher region of said straight portion simultaneously applying equal and opposed pressure against aligned opposite layercontaining sides of the upwardly moving coated web by passing the coated web between the rectangular nip of a pair of opposed downwardly extending flexed blades with beveled working surfaces pressed toward each other and extending across the width of the web; and d. in a still higher region of said straight portion drying the resulting smooth coatings on the web.

Claim 14

Dependent Claim 21 words

The method of claim 10 further characterized by moving the web at a speed in excess of 1,400 ft. per minute.

Claim 15

Dependent Claim 19 words

The method of claim 10 further characterized by moving the web at a speed below 600 ft. per minute.

Claim 16

Dependent Claim 43 words

The method of claim 10 wherein each blade is tapered back at the upper edge of said beveled working surface at an angle to form a back surface of an area equal to a small fraction of the area of said working surface.

Claim 17

Dependent Claim 27 words

The method of claim 10 wherein the blades are constructed of plastic material having a hardness value of between about 90 Shore A and 70 Shore D.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1978-06-09	1978-12-09	1979-06-10	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1982-06-09	1982-12-09	1983-06-10	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1986-06-09	1986-12-09	1987-06-10	$7700.00	Window Closed / Lapsed

Method of simultaneously coating the opposite sides of a paper web

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