Beam Construction And Method For Manufacturing The Same

• US 20080041011A1
• Filed: 08/25/2005
• Published: 02/21/2008
• Est. Priority Date: 08/27/2004
• Status: Active Grant

• Current Assignee: Runtech Systems Oy
• Original Assignee: Runtech Systems Oy
• Inventors: Kannisto, Kari
• Granted Patent: US 7,707,800 B2
• Time in Patent Office: Days
• US Class Current: 52/726.2
• CPC Class Codes: B05C 11/044 characterised by means for holding the blades
• CPC Class Codes: D21G 3/005 Doctor knifes

Abstract

A beam construction, particularly a so-called doctor beam, for use mainly in pulp and paper mills to carry blade holders (7) intended to hold doctor blades. The beam (1) is a composite-construction hollow beam, which also includes at least one composite construction pre-tensioning rod (9, 10, 12). The construction has an essentially triangular cross-section.

Claims

1. Beam construction, particularly a so-called composite-construction doctor beam, for use mainly in pulp and paper mills to carry blade holders intended to hold doctor blades, characterized in that the construction is formed of two separate components that are nevertheless attached to each other, and to include at least one composite construction pre-tensioning rod.

2. Beam construction according to claim 1, characterized in that the construction has an essentially triangular cross-section, in such a way that flange components are formed from two of its three corners.

3. Beam construction according to claim 2, characterized in that the components are attached to each other by the flange.

4. Beam construction according to claim 1, characterized in that there are at least two, mainly three pre-tensioning rods.

5. Beam construction according to claim 1, characterized in that the pre-tensioning rods are located inside the beam construction near the corners or the triangle.

6. Beam construction according to claim 2, characterized in that the flange component includes a doctor-blade holder.

7. Beam construction according to claim 1, characterized in that it includes holes for ventilating the interior space of the beam and/or a connection for leading a mechanical airflow into the beam.

8. Beam construction according to claim 1, characterized in that the composite construction of the pre-tensioning rods corresponds to the composite construction of the beam.

9. Method for manufacturing a beam construction, particularly a so-called composite-construction doctor beam, which is intended to be used mainly for carrying blade holders intended to hold the doctor blades of the rolls of pulp and paper mills, characterized in that two separate composite-construction components, in which there are flange components, are manufactured and the components are attached to each other, in order to form an essentially triangular structure and the beam thus formed is equipped with at least one composite-construction pre-tensioning rod.

10. Method according to claim 9, characterized in that the construction is equipped with three composite-construction pre-tensioning rods, which are located inside the construction near to its corners.

11. Method according to claim 9, characterized in that the components are manufactured by laminating one-direction reinforcement, in which the reinforcing fibres lie in the same directions, in a manner with the different directions crossing each other.