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Substrate Coater

IP.com Disclosure Number: IPCOM000051035D
Original Publication Date: 1982-Aug-01
Included in the Prior Art Database: 2005-Feb-10
Document File: 2 page(s) / 39K

Publishing Venue

IBM

Related People

Flanagan, DE: AUTHOR [+2]

Abstract

In this coater a continuous web of flexible, plastic substrate 10 is fed to the nip of a coating station 11a, as the web travels in the direction indicated at a constant velocity. Web 10 is a few feet wide, and cooperates with a highly polished, cylindrical steel roller 11, and rollers 12 and 13, not necessarily of steel, all of which rotate on parallel axes. Rollers 11 and 13 are idler rollers, whereas roller 12 is driven in the direction indicated. A coating liquid is supplied (by means not shown) to the nip formed by roller 12 and a cooperating, stationary coating rod 14, to form a pool of coating liquid 15 upstream of nip 12, 14. The portion of web 1O downstream of nip 12, 14 carries a very thin layer of coating liquid which later on dries on the web's surface.

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Substrate Coater

In this coater a continuous web of flexible, plastic substrate 10 is fed to the nip of a coating station 11a, as the web travels in the direction indicated at a constant velocity. Web 10 is a few feet wide, and cooperates with a highly polished, cylindrical steel roller 11, and rollers 12 and 13, not necessarily of steel, all of which rotate on parallel axes. Rollers 11 and 13 are idler rollers, whereas roller 12 is driven in the direction indicated. A coating liquid is supplied (by means not shown) to the nip formed by roller 12 and a cooperating, stationary coating rod 14, to form a pool of coating liquid 15 upstream of nip 12, 14. The portion of web 1O downstream of nip 12, 14 carries a very thin layer of coating liquid which later on dries on the web's surface. Coating nip 12, 14 is constructed and arranged such that the opposite side and border portions of web 10 remain uncoated.

A thin, flexible smoothing flap 16, of plastic, extends through nip 12, 14 and has its upper end anchored as at 17. The flap's lower end 18 is folded back to form a terminating edge which is parallel to the axes of all rollers.

Rod 14 is generally of the same length as roller 12. Roller 12 is of somewhat longer axial length than web 10 is wide, and flap 16 is as wide or somewhat wider than roller 12.

The length of flap 16, measured from the lower edge of nip 12, 14 to the flap's folded end, is in the range of 1 to 4 inches, the only requirement being that the flap t...