Coating apparatus – Solid applicator contacting work – Movably mounted applicator
Patent
1987-06-22
1989-04-18
Silverman, Stanley
Coating apparatus
Solid applicator contacting work
Movably mounted applicator
101169, 101366, 118259, 118413, B05C 108
Patent
active
048216720
ABSTRACT:
A doctor blade assembly adapted for applying liquid uniformly to a rotating transfer roller includes an applicator head having a channel-like cavity extending longitudinally parallel to the transfer roller axis. A pair of doctor blades extend obliquely from the longitudinal edges of the channel to impinge on the circumferential surface of the transfer roller. The blades each may be secured by longitudinally spaced screws, or by a blade holder secured to a longitudinal piano hinge and spring biased to clamp the respective blade. A pair of rotary end seals are joined to the opposed ends of the channel to form a sealed chamber against the transfer roller. Each end seal includes an end plate resiliently impinging on the end surface of the transfer roller, and a seal member secured to the end plate and disposed to engage the endmost portion of the circumferential roller surface. A plurality of mounting lugs extend outwardly from the applicator head, each lug including a stepped, semi-cylindrical portion. A like plurality of mounting blocks are secured to support arms extending from a pivot shaft that is parallel to the axis of the transfer roller, each mounting block having a slot dimensioned to receive one of the mounting lugs in precision fit. Mounting screws extend from the support arms and mounting block to the applicator head. A plurality of applicator heads are provided, all with the same mounting lug spacing, so that applicator heads may be interchanged quickly by rotating the pivot shaft away from the transfer roller, sliding the lugs out of the mounting block slots, inserting the lugs of a replacement head into the mounting block slots, tightening the mounting screws, and rotating the shaft to move the replacement head into impingement with the transfer roller.
REFERENCES:
patent: 3273536 (1966-09-01), Galer
patent: 3747561 (1973-07-01), Helm
patent: 4351264 (1982-09-01), Flaum et al.
patent: 4461211 (1984-07-01), Wesselmann et al.
patent: 4497250 (1985-02-01), Dressler
patent: 4559871 (1985-12-01), Kutzner et al.
patent: 4581995 (1986-04-01), Stone
patent: 4590855 (1986-05-01), Schommer et al.
patent: 4667595 (1987-05-01), Geretzki
Cohen Howard
Silverman Stanley
Zimmerman Harris
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