Abstract: An improved two roll sugarcane crushing mill has two roll mill modules in tandem, each has a pair of main crushing rolls having a bottom roll and a top roll. The bottom and top rolls are rotatingly mounted in a pair of main frames and a pair of top beams at the two ends respectively. One end of each of the top beams is pivotally attached near an upper end of the main frames towards a feed side for swinging the top beams along with the top roll. At least one feeder roller is provided with a scraper-cum-deflector with a juice drainer in the close proximity of the main crushing rolls. The feeder rollers are mounted on an auxiliary frame which is mounted on the main frame to adjust the loading the feeder roller in a desired position.
Abstract: A method for calendering a web such as a paper web in a multi-nip calender or supercalender, in which the web is passed through calendering nips formed by rolls placed in two or more stacks of rolls. The web is passed alternatingly from the corresponding calendering nip in each stack of rolls into the calendering nip in the following stack of rolls. In other words, the web is passed from a first calendering nip in a first stack of rolls to a first calendering nip in a second stacks of rolls, after the first calendering nip in the second stack of rolls to a second calendering nip in the second stack of rolls, from the second calendering nip in the second stack of rolls to a second calendering nip in the first stack of rolls, and after the second calendering nip in the first stack of rolls to further processing.
November 2, 1998
Date of Patent:
December 21, 1999
Jukka Koskinen, Markku Kyytsonen, Vilho Nissinen
Abstract: A platform at one side of a battery of rolls in a calender can be moved up or down when the rolls are not driven or when a breastwork at the parapet of the platform is moved to a raised position so that an operator standing on the bottom wall of the platform cannot reach a nip of the rolls while the rolls are driven.
Abstract: A calender in a paper or board machine comprises a calender frame, at least two soft-faced rolls mounted on the calender frame and at least one hard roll mounted on the calender frame in a manner that allows the hard roll to be displaced between a first position in which it forms calendering nips with the two soft-faced rolls and a second position in which it is spaced from the soft-faced rolls. During threading of the web; while the calender is in operation, the hard roll is shifted to its second position, the web is passed over the soft-faced rolls, and the hard roll is shifted back to its first position and brings the web into the nips between the hard roll and the soft-faced rolls.
October 10, 1991
Date of Patent:
July 19, 1994
Valmet Paper Machinery Inc.
Pekka Koivukunnas, Juha Honkala, Risto Turunen, Juhani Niskanen, Ville Korhonen, Timo Pirinen
Abstract: An on-machine calender device intended to be on-line connected to a paper machine. The calender comprises a number of subsequent calendering nips, through which the web (W) to be calendered can be passed. The nips are formed between a soft calender roll and a hard calender roll or between two soft calender rolls. The calender is composed of one or several, for example two, subsequent calender modules (M.sub.1, M.sub.2). The modules comprise one counter-roll (10, 20) and at least two soft calendering rolls (11, 12, 13; 21, 22, 23), which are placed at both sides of the counter-roll (10, 20) in the direction of running of the web (W). The calender rolls (10, 11, 12, 13;20, 21, 22, 23) are dispaceable in relation to each other so that the threading of the web (W) can be carried out as a straight run, for which purpose an open passage is opened through the calender.
Abstract: The smoothing and calibrating of paper is described which utilizes a calender mechanism, particularly in its application to the production of photographic base paper in a papermaking line, and in which hard cylinders are positioned next to each other in which adjacent cylinders are of different diameters.
Abstract: The auxiliary device for drawing in a lap sheet between the calender rollers includes a curved plate and a flexible flat structure secured to a rear edge of the plate. The plate is introduced into a gap between the first two calender rollers and moved about the second roller until entering the gap between the second and third rollers. The start of a lap sheet is then placed on the flexible flat structure and secured thereon and the plate and flexible flat structure then advanced until the lap issues upwardly through the gap between the second and third rollers. The auxiliary device is then removed and the leading edge of the lap sheet introduced between the third and fourth calender rollers for delivery to a winding roller.