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Mechanism for assisting opening and closing of screw cap

a technology of screw cap and assistance mechanism, which is applied in the direction of caps, applications, liquid handling, etc., can solve the problems of pet bottles that cannot be unsealed with ease, and pet bottles that cannot be opened or closed with ease, so as to reduce the force necessary, improve strength and durability, and simple structure

Inactive Publication Date: 2011-01-13
MICHIWAKI HIROSHI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

"The invention relates to a screw cap opening / closure assistance mechanism for a vessel that holds food or beverages. The technical effect of the invention is to provide a more convenient and easy-to-use screw cap opening / closure mechanism that reduces the force required for opening and closing the screw cap, while also preventing deformation of the screw cap and increasing the force of friction between the screw cap and the vessel's opening. Additionally, the invention aims to provide a more user-friendly and convenient screw cap opening / closure assistance tool that can be easily carried by users."

Problems solved by technology

Hence, the PET bottle is required to possess a high hermetic sealing characteristic, and a large force of closure is needed for a cap fitted to the vessel's opening However, since ease in drinking is prioritized in a PET bottle, the outer diameter of the opening of the vessel and hence the outer diameter of the cap are necessarily smaller, as a result of which a larger force is needed for unsealing the cap.
Hence, a problem is raised that, for persons of weaker physical power, such as children, women, aged persons, those suffering from diseases, or physically handicapped persons, a PET bottle cannot be unsealed with ease, or the PET bottle, once unsealed and closed, cannot be opened or closed with ease.
In a screw cap, formed of plastics, inter alia, the screw cap's tubular base part is liable to be deformed, with the result that the force of fiction between the screw cap and the vessel's opening is appreciably increased to increase the force required in opening / closure.

Method used

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  • Mechanism for assisting opening and closing of screw cap
  • Mechanism for assisting opening and closing of screw cap
  • Mechanism for assisting opening and closing of screw cap

Examples

Experimental program
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Effect test

example 1

[0061]Several Examples of the screw cap opening / closure assistance mechanism 10 according to the present invention will now be described with reference to the drawings (FIGS. 1 to 4). It is noted that the screw cap opening / closure assistance mechanism 10 of the present Example 1 is of the type formed as a member independent of a screw cap 20. Viz., in use, the screw cap opening / closure assistance mechanism 10 is fitted to the screw cap 20 for rotation in unison therewith, as shown in FIG. 1.

[0062]A vessel 30 is a PET (polyethylene terephthalate) bottle that holds a beverage, for example. This vessel is formed by blow molding a transparent resin, such as polyethylene terephthalate, to form a bottomed substantially cylindrical tubular base part, an upper portion of which is narrowed to provide an opening part 31. The outer peripheral part of the opening part 31 is formed with flutes of an interrupted helix operating as a mating engagement part 32. The screw cap 20 may be in threaded e...

example 2

[0079]An Example 2 of the present invention, as a modification of the screw cap opening / closure assistance mechanism according to the present invention, will now be described in detail with reference to the accompanying drawings (FIGS. 5 and 6). In the following explanation, the explanation of the formulation similar to that of Example 1 is dispensed with. Similarly to the screw cap opening / closure assistance mechanism 10 of Example 1, a screw cap opening / closure assistance mechanism 110 is formed as a member independent of a screw cap 120.

[0080]Referring to FIGS. 5 and 6, the screw cap opening / closure assistance mechanism 110 of the present Example, formed of polypropylene, includes an annular part 111, encircling the outer peripheral surface of the tubular base part 21 of the screw cap 20, and a disc-shaped fitting stop 112 formed as one with the upper end of the annular part 111. The screw cap opening / closure assistance mechanism also includes coupling parts 113, 113 formed as on...

example 3

[0090]An Example 3 of the present invention, as a modification of the screw cap opening / closure assistance mechanism 210 according to the present invention, will now be described in detail with reference to the accompanying drawings (FIGS. 7 to 9). In the following explanation, the explanation of the formulation similar to that of Examples 1 and 2 is dispensed with. In the present Example, the screw cap opening / closure assistance mechanism 210 is of such a type in which a screw cap opening / closure assistance mechanism is molded as one with the screw cap.

[0091]The screw cap opening / closure assistance mechanism 210 of the present Example, is formed of polypropylene and, as shown in FIGS. 7A and 7B, is formed as one with a screw cap 220 on its outer surface. The screw cap 220 includes a substantially cylindrically-shaped tubular base part 221 and a substantially disc-shaped closure part 222 that stops up the upper end of the tubular base part 221. The inner peripheral surface of the tu...

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PUM

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Abstract

A screw cap opening / closure assistance mechanism (10) assists in opening and closure of a screw cap (20) in a screw cap mechanism. The screw cap opening / closure assistance mechanism includes a coupling part (13) provided on the screw cap (20) and an opening / closure assistance part (14) connected to the coupling part (13). One end of the coupling part is adapted to be rotated in unison with the screw cap (20). This opening / closure assistance part is positioned in proximity to an outer surface of the screw cap (20) when the screw cap opening / closure assistance mechanism has not been used or when it is not in use. For opening / closure, the screw cap opening / closure assistance part is moved away from the screw cap (20) so as to form a large diameter moving part rotatable in unison with the screw cap (20), An arrangement is so made that the force of rotation needed for the opening / closure operation for the screw cap (20) may be smaller.

Description

TECHNICAL FIELD[0001]This invention relates to a screw cap opening / closure assistance mechanism for assisting the opening / closure of a screw cap in a vessel provided with a screw cap mechanism.BACKGROUND ART[0002]A vessel provided with a screw cap mechanism including a so-called screw cap is used in variable formulations and is in widespread use because it has a high hermetic sealing characteristic and also because it allows for reiterative opening / closure operations. Such screw cap mechanism includes a mating engagement part provided in the form of a helix on an outer peripheral surface of an opening of a vessel. The screw cap mechanism also includes a tubular base part whose inner peripheral surface carries an engagement part that engages with the mating engagement part, and a closure part that stops up one end of the tubular base part and that openably closes the opening. The vessel may be exemplified first of all by glass bottles or bottles of plastics.[0003]Such vessels that ho...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B65D41/00
CPCB67B7/18B65D41/0485
Inventor MICHIWAKI, HIROSHI
Owner MICHIWAKI HIROSHI