Process for producing an arrangement for determining the relative position of two bodies that are movable in relation to each other

• US 6,564,468 B2
• Filed: 05/15/2002
• Issued: 05/20/2003
• Est. Priority Date: 05/14/1999
• Status: Expired due to Term

• Current Assignee: Rexroth Star GmbH
• Original Assignee: Rexroth Star GmbH
• Inventors: Schnös, Bruno, Blattner, Peter, Kirchner, Herbert
• Primary Examiner(s): Gutierrez, Diego
• Assistant Examiner(s): Guadalupe, Yaritza
• Application Number:
  US10/146,009
• Publication Number:
  US 20020129508A1
• Time in Patent Office: 370 Days
• Field of Search: 337/06, 337/07, 337/08, 337/10, 337/03, 337/05, 228/178, 228/182, 219/121.64, 219/121.76
• US Class Current: 33/706
• CPC Class Codes: F16C 29/005 Guide rails or tracks for a linear bearing, i.e. adapted for movement of a carriage or bearing body there along
• CPC Class Codes: F16C 29/0633 with a bearing body defining a U-shaped carriage, i.e. surrounding a guide rail or track on three sides
• CPC Class Codes: F16C 41/007 Encoders, e.g. parts with a plurality of alternating magnetic poles
• CPC Class Codes: G01D 5/147 influenced by the movement of a third element, the position of Hall device and the source of magnetic field being fixed in respect to each other
• CPC Class Codes: G01D 5/2457 Incremental encoders having reference marks

Abstract

In an arrangement for determining the relative position of two bodies (3, 7) that are movable relative to each other, a separate measuring tape (29) is attached to a first (3) of the two bodies (3, 7). The measuring tape includes at least one track of measuring markings, distributed in the longitudinal direction of the tape. The second (7) of the two bodies (3, 7) carries a sensor arrangement (31) which responds to the measuring markings and travels along the track, in the course of relative movement between the two bodies (3, 7). The measuring tape (29) is attached to the first body (3), at at least two attachment points that are arranged at a distance from each other in the longitudinal direction of the tape, and is elastically stretched between the attachment points in the longitudinal direction of the tape.

Claims

1. A process for the production of an arrangement for the determination of the relative position of two bodies that are movable in relation to each other, wherein a first of the two bodies carries measuring markings that are distributed over a marking range and the second of the two bodies carries a sensor arrangement which responds to the measuring markings and travels over the marking range in the course of relative movement between the two bodies, said process comprising:

covering the measuring markings by a cover tape which is separate from the first body; and

attaching the cover tape to the first body along each of the longitudinal edges of the cover tape by at least one longitudinal welding seam adjacent to the respective longitudinal edges of the cover tape, said two longitudinal welding seams being applied essentially simultaneously.

2. A process according to claim 1, wherein said longitudinal welding seams are applied in the same welding direction.

3. A process according to claim 2, wherein the longitudinal welding seams are applied jointly, starting from one lengthwise end of the cover tape.