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Showing papers by "Nokia published in 1978"


Patent
Huostila Markku1, Haapsaari Timo1
06 Jul 1978
TL;DR: In this article, a method and apparatus for transferring a web from a pick-up fabric to a flow-through drying wire for transport of the wire supported web to a Flow-Through dryer cylinder is described.
Abstract: A method and apparatus in a paper making machine for transferring a web from a pick-up fabric to a flow-through drying wire for transport of the wire supported web to a flow-through dryer cylinder including passing a section of the flow-through drying wire over the web supported by the pick-up fabric thereby defining a sandwich structure of the drying wire, the web and the pick-up fabric. A first vacuum is applied by a first vacuum member on the sandwich structure from the flow-through drying wire side over a narrow first detaching zone. The direction of the pick-up fabric with respect to the flow-through drying wire is deviated and a second vacuum is applied by a second vacuum member over a second detaching zone subsequent to the first detaching zone in the direction of web travel from the drying wire side thereof thereby securing the web on the flow-through drying wire. The pick-up fabric may thus comprise either a felt or wire structure.

23 citations


Patent
06 Jul 1978
TL;DR: In this article, a method for dewatering a tissue web without wet pressing and transferring the web onto a flow through drying cylinder is described, where the web is transferred to a flow-through wire which passes over the web carrying pick-up felt at a suction roller by the application of suction over a narrow zone.
Abstract: In a tissue paper making machine, a method for dewatering a tissue web without wet pressing and transferring the web onto a flow through drying cylinder including conducting a tissue web onto a pick-up fabric formed of felt and dewatering the web, without wet pressing, into the pick-up felt through the application of suction and capillary forces until the web has sufficient dry matter content to be passed to a flow through drying cylinder. The web is transferred to a flow through wire which passes over the web carrying pick-up felt at a suction roller by the application of suction over a narrow zone, the web being secured to the flow through wire by the application of additional suction over a broader suction zone.

11 citations


Patent
Kirjavainen Kari Johannes1
29 Dec 1978
TL;DR: In this paper, a method for adjusting the capacity and diameter of an electric conductor provided with an insulation coating of foamed plastics material in an extruder press is presented, where the deviation of the capacity of the insulated conductor from a preset capacity and the deviation from a specified diameter are measured at the path of movement of the conductor.
Abstract: A method of and a device for adjusting the capacity and the diameter of an electric conductor provided with an insulation coating of foamed plastics material in an extruder press. The press is provided with an adjustably rotating feed screw and adjustable heating means. The deviation of the capacity of the insulated conductor from a preset capacity and the deviation of the diameter of said conductor from a preset diameter are measured at the path of movement of the conductor. The rotation speed of said screw is adjusted in response to said capacity deviation and said diameter deviation and the temperature of said heating means is also adjusted in response to said capacity variation and said diameter deviation in order to correct said deviations.

8 citations


Journal ArticleDOI
TL;DR: The recovery boiler is an expensive and critical subprocess in the sulphate pulp mill and it will quite often cause a bottleneck in production and the possible ways of tackling this problem are dealt with.

3 citations


Patent
Pekka T. Sammatti1
24 Feb 1978
TL;DR: A flotation purification apparatus for separating solids from solids-containing liquids is described in this article, which consists of a flotation tank, an annular distributing channel positioned in said tank for supplying the liquid to be purified into said tank and an upwardly widening partition wall positioned in a tank and separating the distributing chamber from outlets for the solids and the purified liquid respectively.
Abstract: A flotation purification apparatus for separating solids from solids-containing liquids. The apparatus comprises a flotation tank, an annular distributing channel positioned in said tank for supplying the liquid to be purified into said tank and an upwardly widening partition wall positioned in said tank and separating the distributing chamber from outlets for the solids and the purified liquid respectively. The distributing channel is provided with outlets directed toward the corner between the bottom of said tank and said partition wall.

1 citations


Journal ArticleDOI
Sakari Heikkilä, Risto Tanner1
TL;DR: In this article, a decision rule for selecting and priority rating of future computer control applications is presented. But it does not take into account company goals, economical comparisons between alternatives, the limits of available resources, and technical progress in the control field.