The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 22, 1980
Filed:
Jul. 31, 1978
Susumu Kojimoto, Takatsuki, JP;
Takami Sato, Toyonaka, JP;
Junji Ono, Takatsuki, JP;
Toshio Mori, Toyonaka, JP;
Shigeharu Suzuki, Settsu, JP;
Sumitomo Chemical Company, Limited, Osaka, JP;
Abstract
In an irrigation hose which is produced by melt-sticking double thermoplastic resin film in a plane along longitudinal parallel lines so as to form 2 to 3 passages, one a supply passage and others being constant pressure passages, the supply passage being connected to each constant pressure passage by communicating holes which are formed by non-melt-stuck portions spaced in the melt-stuck line between both passages, and the constant pressure passage having water-irrigating holes which are formed by non-melt-stuck portions spaced in an outside melt-stuck line thereof, the improvement which comprises making small melt-stuck portions in the vicinity of the communicating holes and/or water-irrigating holes.