IP Library › Patent Application 16726728
Patent Application
App. No. 16/726,728

METHOD WITH A HORIZONTAL JET APPLICATOR FOR A PAPER MACHINE WET END

Loading inventors, assignments & file history…
Monitor This Case
Get email alerts when status or documents change.
Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US None
App. No.
16/726,728
Abstract

A method applying additives to a forming web of paper fiber by pumping an additive through a channel in an applicator to a horizontal slot with a vertical gap of less than 0.100 inch at a rate of less than 5 US gallons per minute per inch of the slot, the additive leaving the slot in a substantially horizontal direction above the forming web traveling in a substantially horizontal direction.

Claims (12)

1 . A method of applying additives to a forming web of paper fiber, the method comprising pumping an additive in a fluid through a channel in an applicator to a horizontal slot with a vertical gap height of less than 0.100 inch at a rate of less than 5 US gallons per minute per inch of the slot, the additive leaving the slot in a substantially horizontal direction above the forming web traveling in a substantially horizontal direction.

2 . The method according to claim 1 wherein the slot is formed from long, essentially parallel lips.

3 . The method according to claim 2 wherein the essentially parallel lips have an angle between the top surface of the bottom lip and the bottom surface of the top lip of less than 3 degrees.

4 . The method according to claim 1 wherein the percent by weight of the additive in fluid is less than about 4%.

5 . The method according to claim 4 wherein the percent by weight of the additive in fluid is less than about 1.5%.

6 . The method according to claim 1 wherein the slot gap height is between 0.015 and 0.060-inches.

7 . The method according to claim 1 wherein the additive enters the applicator through an expansion chamber where the additive then accumulates behind a restriction to ensure its even distribution through an about 0.120-inch channel into a nozzle chamber where the additive then gets distributed evenly across and through the horizontal slot.

8 . The method according to claim 7 wherein applicator chambers inside the applicator through which the additive passes are small enough to keep the additive fluid.

9 . The method according to claim 8 wherein flow inside the applicator maintains micro turbulence of the additive.

10 . The method according to claim 1 wherein the additive is microfibril.

11 . The method according to claim 1 wherein pumping is at a rate of between 1 to 2 US gallons per minute per inch of the slot.

12 . The method according to claim 1 wherein the velocity of the additive leaving the slot is about the same as the speed of the forming web traveling in the substantially horizontal direction.