Dispensing – Collapsible wall-type container – Nonmetallic
Reexamination Certificate
2000-03-13
2002-01-01
Bomberg, Kenneth (Department: 3754)
Dispensing
Collapsible wall-type container
Nonmetallic
C220S613000, C220S634000, C220S680000, C215S044000
Reexamination Certificate
active
06334548
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention includes the first to forth inventions. The first invention relates to a plastic container, which is suitable for receiving contents in the form of powder, particle or liquid, and a method for manufacturing such a plastic container. The second invention relates to a container for receiving fluid such as calking agent, sealant, adhesive, mayonnaise or the like. The third invention relates to a fluid discharging apparatus for squeezing a fluid dispensing cartridge formed of a film into a tubular shape from its one end to discharge fluid such as adhesive received in its inside from an opening end provided at the other end of the cartridge, and to an installation apparatus, which is to be used in combination with the above-mentioned fluid discharging apparatus. The fourth invention relates to a fluid discharging apparatus for squeezing a fluid dispensing cartridge formed of a flexible film to discharge fluid such as adhesive, calking agent or the like, which is received in the cartridge.
2. Description of the Related Art
With respect to the first invention, a container for receiving a solid such as ground coffee beans, the moisture of which should be decreased, is required to be formed of material through which moisture cannot pass. As such a kind of container, there is generally used a glass container, a metallic can or a plastic container obtained by a blow molding method.
The glass container or the metallic can are excellent in moisture-proof property and gas isolating property, and has a good storing property. They however have problems of weight and volume of the container itself, which may hinder a disposal of the used container.
The plastic container obtained by the blow molding method can solve the problems of weight and volume of the glass container and the metallic can. It is however impossible to decrease the thickness of the plastic container under 0.7 mm by the conventional blow molding method. Accordingly, with respect to the plastic container obtained by the blow molding method, only a co-extruded article of a barrier base material such as ethylene vinyl alcohol (EVOH) copolymer resins (i.e., “EVAL” (trademark)) and a synthetic resin material such as polyethylene, polypropylene or the like can provide appropriate moisture-proof property and gas isolating property.
In order to solve the above-mentioned problems of the plastic container, the applicant developed a method for manufacturing the plastic container, which comprises the steps of putting an intermediate tubular body formed of a plastic laminate film on a mandrel serving as a core for a mold; putting upper and lower local molds on the mandrel in which the intermediate tubular body has already been put; injecting synthetic resin material in a molten state into the upper and lower local molds by the insert-injection process so as to form upper and lower formed members integrally with the outer surface of the intermediate tubular body.
The plastic container
1
obtained by the above-described method for manufacturing the plastic container comprises the intermediate tubular body
2
, the upper formed member
3
integrally connected to the outer surface of the upper end portion of the intermediate tubular body
2
, the lower formed member
4
integrally connected to the outer surface of the lower end portion of the intermediate tubular body
2
and a cover member
5
for closing the opening end of the upper formed member
3
, as shown in FIG.
6
.
The intermediate tubular body of the plastic container is formed of the plastic laminate film so that a multicolor printing can be applied on the outer surface of the intermediate tubular body. However, the upper and lower formed members formed on the outer surface of the intermediate tubular body decrease the effective area on which the printing is to be applied.
When the above-described method for manufacturing the plastic container is carried out under the conditions that the lower formed member is provided with a bottom and the lower edge of the intermediate tubular body comes into contact with such a lower formed member, wrinkles may occur at the end of the intermediate tubular body or the end thereof may be turned up due to the injection pressure of the synthetic resin material in the molten state during the insert injection forming, thus leading to substandard articles.
With respect to the second invention, the container for receiving fluid such as calking agent, sealant, adhesive, mayonnaise or the like generally comprises a main body formed into a tubular shape having opposite opening ends and two bottom members (i.e., closing devices) for closing the opposite opening ends of the main body, respectively. The container can receive the fluid such as adhesive in its inside. The main body is formed of a laminate comprising a plurality of films in order to ensure strength and to prevent surely an air ventilation between the outside and inside of the main body. Each of the bottom members is formed into a circular shape having sufficient rigidity. A hole is formed in the central portion of any one of the bottom members. The hole is closed by a sealing film. The bottom members are fixed to the opposite opening ends of the main body, thus closing the opposite opening ends thereof and ensuring a shape maintenance property of the whole container.
When the fluid, for example adhesive, received in the container, is used, the sealing film for closing the hole is broken and a nozzle is connected to the hole. The container is then inserted into a cylinder of a fluid discharging apparatus such as a discharging gun. When a pressing body, which is slidable in the cylinder, presses the other bottom member of the container, the main body is squeezed so that its portion near the pressing body deforms into a bellows-shape. Consequently, the adhesive received in the container is discharged through the hole and the nozzle.
The press of the container by means of the pressing body causes increase in internal pressure of the main body, leading to expansion of the main body. As a result, the laminate forming the main body is strongly pressed against the inner surface of the cylinder so that a portion of the laminate may stick to the inner surface of the cylinder. A further advance of the pressing body in such a condition may cause the stuck portion of the laminate to be caught between the inner surface of the cylinder and the outer surface of the pressing body. If once the portion of the laminate is caught between them, the length thereof increases in proportion to the moving distance of the pressing body. When the length of the caught portion of the laminate exceeds the prescribed value, the pressing body cannot advance, thus making it impossible to discharge the adhesive from the container.
Japanese Patent Provisional Publication No. S56-51,265 discloses a method for preventing the occurrence of the above-mentioned catching problem of the laminate. The method comprises the steps of inserting a container into a tubular body, which is formed of a sheet-shaped film, and inserting both of the container and the tubular body into a cylinder. The tubular body placing between the inner surface of the cylinder and the outer surface of the container prevents the laminate from being caught between them.
According to the method disclosed in Japanese Patent Provisional Publication No. S56-51,265, it is necessary to put the tubular member outside the container whenever a new container for fluid is used, thus causing troublesome problems. After the fluid received in the container is used up, the tubular member is also subjected to disposal as waste, leading to an increased amount of wastes.
With respect to the third invention, the fluid discharging apparatus comprises a receiving tube having a pressing body, which is slidable in the inside of the receiving tube, a piston for urging the pressing body in the longitudinal direction of the receiving tube. When the piston presses a fluid-dispensing cartridge, which is put in the rece
Ichikawa Tooru
Moteki Yoshiji
Tanaka Yoji
Bomberg Kenneth
Hosokawa Yoko Co., Ltd.
Parkhurst & Wendel LLP
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