Synthetic resin bottle

Patent Name Synthetic Resin Bottle Maker Patent applicant Beihai Can Making Co., Ltd. Principal Applicant Address Tokyo, Japan Inventor Toshio Fumada; Sakurai Yasunari; Sakurai Yasuhiro; Yenog Application (patent) No. 03815155.3 Date of Application 2003.06.18 Certification Date Approval Announcement No. 1665723 Auditing Notice Day 2005.09.07 Manual Disc No. D0536 Main Classification No. B65D41/34 Class No. B65D41/34; B65D53/04; B65D1/02 Division Original Application No. Priority Item No. 2002.6.25 JP 183837/2002 Abstract A synthetic resin bottle with better sealing performance can be obtained between the mouth and the plastic cover. Including: The mouth portion (2) formed with the male screw portion (3) and thermally crystallized. Also included is a plastic cap (6) screwed to the mouth (2), the plastic cap (6) comprising: a top plate (7), a cylindrical portion (8) having an external thread portion (9), a side edge seal portion (10) Cover seal gasket (11). The mouth portion (2) includes a top plate abutment portion (15) abutted to the top plate (7) via a lid seal gasket (11), and is abutted against the side edge seal portion (10) via the lid seal gasket (11). The side edge seals the abutment portion (16). The side edge seal contact part (16) has an annular protrusion (17). The annular protrusion (17) has a substantially semicircular cross-sectional profile and is connected to the top plate abutment (15) via a curved portion (18) having the cross-sectional profile from the end of the side edge seal (10). The lid seal gasket (11) is crimped with the portion on the top plate (7) side. The arc-shaped cross-sectional profile has a radius in the range of 0.4 to 0.8 mm. The annular protrusion (17) protrudes in a range of 0.03 to 0.2 mm on one side. Sovereignty Item 1. A synthetic resin bottle comprising: a mouth portion having a male thread portion formed on the outer surface side and thermally crystallized; and a plastic cap screwed to the mouth portion for capping; the plastic cap includes : A disk-shaped top plate, a cylindrical portion extending from an outer circumferential edge of the top plate along a side surface of the mouth portion, and having an internal thread that can be screwed to the external thread portion of the mouth portion on an inner surface side, and An annular side edge sealing portion formed on an inner circumferential side of the cylindrical portion of the top plate and protruding toward the mouth portion, and a cover seal gasket disposed on an inner surface of the top plate and the side edge sealing portion; the mouth portion comprising: The open end of the mouth portion is abutted to the top plate abutment portion of the top plate via the cover seal gasket, and is connected to the outer surface side of the top plate abutment portion and abuts against the side edge through the cover seal gasket. a side edge sealing abutment portion of the portion; characterized in that the side edge sealing abutment portion has an annular protrusion protrudingly formed on an outer surface side, the annular protrusion having a substantially semicircular cross sectional profile, and having the circle via The curved section of the curved section is connected to the top plate The connecting portion is also pressure-contacted with the lid sealing gasket from the end of the side edge sealing portion and on the top plate side; the arc-shaped cross-sectional profile has a radius in the range of 0.4 to 0.8 mm. International Application PCT/JP2003/007722 2003.6.18 International Publication WO2004/000674 Date 2003.12.31 Date of Entry into the Country Patent Agency Organizational Patent and Trademark Agency Co., Ltd. Agency Address Zhang Liyan