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Title: Underground irrigation devices and methods of making and using the same

Abstract: A perforated pipe method of making a perforated pipe suitable for subsurface irrigation laterals by forming indentations and perforations in indentations of sheet material then rolling the sheet material into a tube or pipe.


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Inventors: Angle, William M.

Application Number: 637475
Filing Date: 1975-12-03
Publication_date: 1977-03-01
Assignee:
Primary Class(es): 428/34.1 72/127, 72/179, 138/103, 138/177, 156/196, 156/218, 156/252, 264/155, 264/295, 264/296, 264/339
Other Classes:
US Patent Ref:
3183571May, 1965Schmunk et al.264/156.
3864446Feb, 1975Maroschak264/156.

Other Refs: 1,091,989
Nov, 1967UK

Primary Examiner: Hoag, Willard E.
Assistant Examiner:
Attorney: