Easily openable sealed plastic closure

Claim 2

In a closure arrangement for a container having a wall area of plastic of a given thickness with a ''''score'''' line in said plastic to define a relatively thin cross-section forming a line of tear surrounding a removable closure part, with the plastic defining said score line being brought to a point at an exposed plastic edge to facilitate starting the tearing of the plastic and a handle adjacent said point and secured to the plastic adjacent said point for applying a pulling force for said tearing of the plastic, the improvement comprising: said wall area having an outer face, said outer face having a portion along one side of said score line with said portion being contiguous with the score line and on the opposite side of the score line from the closure part, said portion being generally planar with the closure part, a projection integral with the closure part of said wall area and having a portion thereof spaced outwardly from said outer face at said one side, a part of said score line, including said point, being between said portion of said projection and said portion of said outer face, said handle being secured to said projection.

Claim 3

In an arrangement as set forth in claim 1, wherein adjacent said point there is a recess on the side of said wall area opposite said face, said recess extending up into said projection so as to define a thin plastic section extending outwardly from said face and between the face and projection, said thin section being a part of said ''''score'''' line.

Claim 4

In an arrangement as set forth in claim 2, wherein the major portion of said ''''score'''' line is between the faces of said wall area, and including a thin transition part of said plastic between said part and said major portion of said ''''score'''' line.

Claim 5

In an arrangement as set forth in claim 3, wherein said wall area and its closure arrangement are part of a plastic body, and including a plastic dust cover over said body and the handle thereof, and releasable locking means connecting the dust cover and the body, said locking means including two arms each forming a part of an individual lock and resiliently urged to the locking positions, said arms being movable against said urging to respective unlocking position, said lock means being constructed so that each arm must be moved in a different direction from the other in order to unlock the respective lock, said locking means also including detent means connecting the cover and the body and reQuiring a force to be applied to the cover and body to separate the two, whereby at least three different actions must be simultaneously performed to remove the cap from the body thereby protecting said handle against being accessible except to someone having significant manual dexterity.

Claim 6

In a plastic closure arrangement for a container wherein there is a plastic body part defining a dispensing opening, a plastic dust cap part fitting on said body and covering said dispensing opening, means preventing the separation of said parts except by movement in a given direction, and a releasable lock holding said parts against movement in said direction, the improvement wherein said releasable lock comprises: two members on one of said parts, integral therewith and defining abutments, two members on the other of said parts, integral therewith and defining abutments, a specific two of said members including arms projecting outwardly from the respective part and having the abutments adjacent the distal ends of said arms, the abutments of said specific two members contacting the abutments of the other two members to prevent movement of said cap member in said direction, said arms being resilient so that the arms can be moved to displace the abutments thereof from the abutments of the other two members, said arms being spaced from each other so that they must be moved individually to achieve said displacement; and detent means releasably connecting the cap part and the body part and holding the two together even after the lock means has been released, whereby while holding the lock means released an additional force must be simultaneously applied to disconnect the detent means and obtain a separation of the dust cap part from the body part.

Claim 7

In a plastic closure arrangement for a container wherein there is a plastic body part defining a dispensing opening, a plastic dust cap part fitting on said body and covering said dispensing opening, means preventing the separation of said parts except by movement in a given direction, and a releasable lock holding said parts against movement in said direction, the improvement wherein said releasable lock comprises: two members on one of said parts, integral therewith and defining abutments, two members on the other of said parts, integral therewith and defining abutments, a specific two of said members including arms projecting outwardly from the respective part and having the abutments adjacent the distal ends of said arms, the abutments of said specific two members contacting the abutments of the other two members to prevent movement of said cap member in said direction, said arms being resilient so that the arms can be moved to displace the abutments thereof from the abutments of the other two members, said arms being spaced from each other so that they must be moved individually to achieve said displacement; and detent means releasably connecting the cap part and the body part and holding the two together even after the lock means has been released, whereby while holding the lock means released an additional force must be simultaneously applied to disconnect the detent means and obtain a separation of the dust cap part from the body part.

Claim 8

A plastic closure arrangement comprising a plastic body having an area defined by a ''''score'''' line which area can be removed by tearing along the score line to leave a dispensing opening, said body including a handle attached to said area, a plastic dust cover over said body and the handle thereof, and releasable locking means connecting the dust cover and the body, said locking means including two arms each forming a part of an individual lock and resiliently urged to the locking positions, said arms being movable against said biasing to respective unlocking position, said locking means being constructed so that each arm must be moved in a different direction from the other in order to unlock the respective lock, said locking means also including detent means connecting the cover and the body and requiring a force to be applied to the cover and body to separate the two, whereby at least three different actions must be simultaneously performed to remove the cap from the body thereby protecting said handle against being accessible except to someone having significant manual dexterity.

Claim 9

A plastic closure arrangement comprising a plastic body having an area defined by a ''''score'''' line which area can be removed by tearing along the score line to leave a dispensing opening, said body including a handle attached to said area, a plastic dust cover over said body and the handle thereof, and releasable locking means connecting the dust cover and the body, said locking means including two arms each forming a part of an individual lock and resiliently urged to the locking positions, said arms being movable against said biasing to respective unlocking position, said locking means being constructed so that each arm must be moved in a different direction from the other in order to unlock the respective lock, said locking means also including detent means connecting the cover and the body and requiring a force to be applied to the cover and body to separate the two, whereby at least three different actions must be simultaneously performed to remove the cap from the body thereby protecting said handle against being accessible except to someone having significant manual dexterity.

Claim 10

An arrangement as set forth in claim 6, wherein said body has two side walls, said cover having two side walls each adjacent a respective side wall of the body thereby defining two pairs of side walls with each pair consisting of one body side wall and one cover side wall, each arm extending outwardly from one side wall of each pair respectively and being normally in juxtaposition to the exterior of the other side wall of the respective pair, said other side wall of each pair having external spaced abutments positioned at opposite sides of the respective arm with the proximal end of said arm being at one side of said abutments and the distal end of said arm being at the other side of said abutments, each arm having projections on its distal end, which projections overlie the respective abutments.