US 12,031,272 B2
Calender for the treatment of web-like materials
Giovacchino Giurlani, Capannori (IT); and Gionata Mazzoni, Vorno (IT)
Assigned to FUTURA S.P.A., Capannori (IT)
Appl. No. 17/425,793
Filed by FUTURA S.P.A., Capannori (IT)
PCT Filed Feb. 18, 2020, PCT No. PCT/IT2020/050032
§ 371(c)(1), (2) Date Jul. 26, 2021,
PCT Pub. No. WO2020/183504, PCT Pub. Date Sep. 17, 2020.
Claims priority of application No. 102019000003707 (IT), filed on Mar. 14, 2019.
Prior Publication US 2022/0112642 A1, Apr. 14, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. D21G 1/02 (2006.01); B29C 33/02 (2006.01); B29C 33/04 (2006.01); D06C 15/02 (2006.01); D21G 1/00 (2006.01); B29C 43/24 (2006.01); B29C 43/46 (2006.01)
CPC D21G 1/0293 (2013.01) [B29C 33/026 (2013.01); B29C 33/044 (2013.01); D06C 15/02 (2013.01); D21G 1/0006 (2013.01); D21G 1/0226 (2013.01); B29C 2043/464 (2013.01); B29C 2043/466 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A calender for the treatment of web-like materials, comprising: a fixed structure supporting two heated rollers reciprocally arranged so as to form a nip traversable by web-like materials, wherein each of the rollers has a right pin and a left pin and on each of the right pin and the left pin are mounted two bearings spaced apart from each other by a predetermined value, and wherein said structure comprises two lower levers and two upper levers, each of the lower and upper levers movable so as to come into contact with a respective bearing of the bearings, such that each of the lower and upper levers exerts on the respective bearing a force that is oriented in a direction not coinciding with directions of forces exerted on others of the bearings, each of the lower and upper levers being connected with a respective actuator that controls a rotation of a respective one of the levers around a respective horizontal axis of the respective lever to put the respective lever in a first engagement position of the respective bearing of the bearings and in a second release position, such that in the second position of each of the lower and upper levers the extraction of each of the rollers from the calender is allowed.