Presses – With additional treatment of material – Cutting – breaking – piercing – or comminuting
Patent
1988-04-13
1989-12-26
Hornsby, Harvey C.
Presses
With additional treatment of material
Cutting, breaking, piercing, or comminuting
34116, 162358, 100118, 100153, 100162R, B30B 1534
Patent
active
048890480
ABSTRACT:
The disclosure describes a drum or roll which may be heated to high operating temperatures and is particularly useful in situations where a high heat flux is required under conditions of high nip and distributed loads on the drum. It consists of a relatively thin rotating shell supported on an axially located stationary inner core. The core has a plurality of shell support bearings. These have close radial clearances with the inner surface of the shell at each location where an extrnal nip roll would be engaged. The spaces between the shell support bearings form pressurizable chambers. These chambers can be filled with a hot pressurized fluid for supporting the shell between the supports located at the nip positions. In one application the roll would be used as the drum in a belt and drum press having high nip loads at several locations and high distributed loads applied by a tensioned belt. The fluid support system for the rotatable shell enables a very thin shell to be used. This permits the desired heat flux while still maintaining the mechanical integrity to support the applied loads. Operating temperatures of the roll could range up to 800.degree. F. with multiple nip loads typically being up to 1000 to 2000 pounds per linear inch and 100-800 psi unit pressure, and with distributed loads between the nips of up to 50 psi. High thermal conductivity materials such as copper or aluminum may be used as shell material to reduce temperature differential and thermal stress.
REFERENCES:
patent: 3319352 (1967-05-01), Haigh
patent: 3362055 (1968-01-01), Bryce
patent: 3430319 (1969-03-01), Skaugen
patent: 3802044 (1974-04-01), Spillman
patent: 3853698 (1974-12-01), Mohr
patent: 4090553 (1978-05-01), Beghin
patent: 4183128 (1980-01-01), Marchioro
patent: 4358993 (1982-11-01), Spillman et al.
patent: 4520723 (1985-06-01), Pav et al.
patent: 4710271 (1987-12-01), Miller
Farrel, n.d., Bulletin No. 134, Nipco and Tri-Pass Rolls (date unknown).
Escher Wyss, n.d., Advances in NIPCO Roll Applications (date unknown).
Escher Wyss, 1979, Line Force Distribution Control.
Escher Wyss, 1981, New Solutions in Calendar Design (reprint from Pulp and Paper, Canada, No. 7, 1981.
Gehr Keith D.
Hornsby Harvey C.
O'Leary K.
LandOfFree
High heat flux roll and press utilizing same does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with High heat flux roll and press utilizing same, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High heat flux roll and press utilizing same will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1572428