Apparatus and method for preventing ink resoftening on a printed

Coating processes – Nonuniform coating – Paper or textile base

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

427361, 4273982, 101487, 34392, B05D 312, B05D 500, B41F 2304

Patent

active

055715648

ABSTRACT:
An offset printing apparatus has a fluid-cooled nip roll which, in use, is placed in intimate contact with a hot, rapidly moving, endless printed and dried paper web so as to improve the cooling efficiency of the first downstream chill roll, permit the use of fewer chill rolls, and avoid condensate streaking. The apparatus takes the form of a nip roll specially designed to press the web into intimate contact with the first downstream chill roll while avoiding damage to the web, nip roll, or chill roll, and while avoiding ink picking by the web surface contacted by the nip roll. Employing the nip roll in the system also permits the use of a substantially shorter dryer and fewer chill rolls as compared to a conventional system operating at the same web speed. The coolant circuit for the nip roll includes a warmup loop which temporarily circulates warm fluid through the nip roll when the system is first taken off-line, thereby preventing condensate formation or frost formation on the nip roll. The warmup loop preferably includes a heat changer that uses waste heat from the coolant circuit to heat the warmup fluid. Two or more nip rolls can be cooled and heated by a single coolant circuit.

REFERENCES:
patent: 3886683 (1975-06-01), Hudgin et al.
patent: 4263724 (1981-04-01), Vits
patent: 5121560 (1992-06-01), Daane et al.
patent: 5471847 (1995-12-01), Murray et al.
patent: 5471927 (1995-12-01), Frank et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Apparatus and method for preventing ink resoftening on a printed does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Apparatus and method for preventing ink resoftening on a printed, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and method for preventing ink resoftening on a printed will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-2013419

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.