Calender for treatment of a product web

Details Calender for treatment of a product web Calender for treatment of a product web

1999-05-06

2001-03-13

Vo, Peter (Department: 3721)

Presses

Concurrent pressing and conveying

Roll type

C100S161000, C100S168000, C100S173000

Reexamination Certificate

active

06199477

ABSTRACT:

CROSS REFERENCE TO RELATED APPLICATIONS
Not applicable.
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH AND DEVELOPMENT
Not applicable.
BACKGROUND OF THE INVENTION
1. Field of the Invention
The invention relates to a calender for treatment of a product web, according to the preamble of claim
1
.
2. Description of Related Art
Rapid development and the requirement for new qualities of product web, especially new paper qualities, having specific properties in terms of use and function call for calender set-ups that differ with respect to the number of rolls and the nature of the rolls, in order to achieve the required web properties. The costs involved in a calender set-up have increased hugely, by virtue of the high production capacities, because of the need for extensive control and regulation devices, which result in high investment costs.
The object of the invention is therefore to provide a calender for treatment of a product web, according to the preamble of claim
1
, which allows a rapid change-over with respect to the nature and intensity of the treatment of a product web in a calender.
BRIEF SUMMARY OF THE INVENTION
The object is met by the features of claim
1
.
A calender is accordingly provided, the configuration of which is capable of being adapted to a specific treatment of a product web. The total number of rolls and nips, both as a whole and sub-divided into individual roll stacks or calendering units, can be so arranged that, by virtue of the selected configuration of the calender, the required treatment on each side of the product web will reliably be achieved. A high degree of flexibility in configuration and adaptation is achieved without additional new investment costs and time-consuming conversions and rearrangements in the configuration of the calender and, in particular, without qualitatively or quantitatively curtailing or compromising the high technical standard. Furthermore, major interruptions to production or production downtime lasting for relatively long periods, which would involve high costs, are avoided. The set-up of the calender can be individually adapted to the desired quality of product web as well as to the nature of the product web.
As a result of the fact that the calender rolls are positioned on the calender frame in modular fashion, rigid and yielding rolls and also deflection controlled rolls can be combined to form a roll set-up in accordance with specification. It is possible to carry out rapid regrouping and rearrangement to form different roll configurations, resulting in a flexible calendering configuration.
Furthermore, as a result of the fact that the holder assemblies for deflection-controllable rolls, on the one hand, and for intermediate rolls, on the other hand, have identically constructed connecting devices, it is possible for short conversion times to be achieved.
For the modules, defined positions can be provided on the calender frame so that the modules are capable of being rapidly re-positioned and of being quickly and reliably connected to, and removed from, the calender frame.
The modules are advantageously in the form of holder assemblies having a carriage guide for the purpose of accommodation and for fastening to the calender frame. For the purpose of accommodating the roll mountings, those holder assemblies for deflection-controllable rolls can be in the form of rigid holder plates. In the case of intermediate rolls, the holder assembly makes it possible for a loading or load-relieving jack to bear against the holder assembly directly.
To adapt the guiding means to the calender set-up in question, the guiding means can be arranged to be displaceable. The externally located guiding means are preferably held on a separate frame.
Further developments of the invention can be found in the following description and in the dependent claims.


REFERENCES:
patent: 4890551 (1990-01-01), Dahl et al.
patent: 4924772 (1990-05-01), Schlunke et al.
patent: 5038678 (1991-08-01), Honkala et al.
patent: 5231924 (1993-08-01), Schneid
patent: 5662037 (1997-09-01), Van Hagg
patent: 5673617 (1997-10-01), Linder
patent: 5988055 (1999-11-01), Cramer

Affiliated with

Also associated with

Rating

Calender for treatment of a product web does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Calender for treatment of a product web, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Calender for treatment of a product web will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2441511