# US 5,344,719 A · Welding band

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- Number: US 5,344,719 A
- Document ID: US5344719A
- Status: Granted
- Kind: A
- Application number: 08/018,551
- Filed: 1993-02-17
- Granted: 1994-09-06
- Earliest claimed: 1992-02-24
- Assignees: Windmoeller & Hoelscher KG
- Inventors: Horst Bauer
- Web page: https://patentgrep.com/patent/US5344719A

## CPC

- B29C 65/224: {being a resistive ribbon, a resistive band or a resistive strip}
- B29C 65/228: {characterised by the means for electrically connecting the ends of said heated wire, resistive ribbon, resistive band or resistive strip}
- B29C 66/4312: {for making flat seams in tubular or hollow articles, e.g. transversal seams}
- B29C 66/80: {General aspects of machine operations or constructions and parts thereof}
- B29C 66/818: {characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps (characterised by the heating means B29C65/24); comprising means for compensating for the thermal expansion of the welding jaws or of the clamps}
- B29C 66/83421: {band or belt types (B29C66/83431 takes precedence)}
- B29C 66/00441: {movable, e.g. mounted on reels}
- B29C 66/1122: {Single lap to lap joints, i.e. overlap joints (B29C66/45, B29C66/472, B29C66/52272 take precedence)}
- B29C 66/8122: {characterised by the composition of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps}
- Y10T 428/1291: Next to Co-, Cu-, or Ni-base component
- Y10T 428/12924: Fe-base has 0.01-1.7% carbon [i.e., steel]
- B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00)
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

The invention relates to a welding band for welding synthetic resin film including a steel band, which is coated in its end parts with a thin copper layer. To attain the aim of improving the working life of such a welding band, the thin copper layer is covered with an even thinner metallic layer, preferably of nickel.

## Claims

### Claim 1

A welding band for welding synthetic resin film, said welding band comprising:
a steel band having end parts coated with a copper layer, said copper layer being coated with a metallic protective layer consisting of nickel having a thickness less than a thickness of said copper layer.

### Claim 2 (depends on 1)

The welding band as claimed in claim 1, wherein said copper layer has a thickness of 40 to 60 .mu.m and said metallic protective layer arranged thereon has a thickness of 2 to 5 .mu.m.

### Claim 3 (depends on 2)

The welding band as claimed in claim 2, wherein said metallic protective layer has a thickness of 3 .mu.m.