US PATENT SUBCLASS 219 / 59.1
.~ Of cylinders (e.g., pipes and tubes)

Current as of: June, 1999
Click HD for Main Headings
Click for All Classes

Internet Version by PATENTEC © 1999      Terms of Use


219 /   HD   ELECTRIC HEATING

50  DF  METAL HEATING (E.G., RESISTANCE HEATING) {19}
59.1.~ Of cylinders (e.g., pipes and tubes) {14}
60 R  DF  .~.~> Electric arc {3}
61.1  DF  .~.~> Having internal support means {3}
61.2  DF  .~.~> Utilizing high frequency resistance heating
61.3  DF  .~.~> With edge guidance means
61.4  DF  .~.~> With adjustable electrode means
61.5  DF  .~.~> With condition responsive control of the welding process
61.6  DF  .~.~> Using three or more electrodes
61.7  DF  .~.~> With cooling means
62  DF  .~.~> Helical seam
63  DF  .~.~> Rotary transformer part
64  DF  .~.~> Container (e.g., cans)
65  DF  .~.~> Nonrotary electrode (e.g., oscillating)
66  DF  .~.~> Inside electrode
67  DF  .~.~> Resistance heating methods

DEFINITION

Classification: 219/59.1

Of cylinders (e.g., pipes and tubes):

(under subclass 50) Subject matter relating to the bonding of a seam of a cylinder.

(1) Note. The seam may be helical, as in indented subclass 62.

SEE OR SEARCH THIS CLASS, SUBCLASS:

101+, for resistance butt bonding of cylindrical shaped tubing.

607+, for this subject matter where the heating is inductive.

SEE OR SEARCH CLASS

413, Sheet Metal Container Making, 58+, for the longitudinal seaming of containers, such as cans, where no significant electric heating is involved.