Receptacle having a dividing wall

Claim 2

In a receptacle provided with a main chamber adapted to receive a first substance and further provided with at least one secondary chamber adapted to initially receive a second, flowable substance to be subsequently mixed in said main chamber with said first substance for producing a mixture such as a dental preparation, said substances being capable of reacting upon each other; dividing wall means in said receptacle for normally separating said main and secondary chambers from each other, said dividing wall means having at least one weakened, substantially linear portion; and additional wall means located adjacent to said dividing wall means and cooperating with the latter in forming at least one of said chambers; Said dividing wall means comprising material of a strength and elasticity such that when predetermined buckling forces act thereon, said dividing wall means will rupture along said weakened portion and a gap will be formed therein for transfer of said second substance from said secondary chamber to said main chamber, but upon termination of the action of said buckling forces said gap will be closed to again separate said main and secondary chambers from each other.

Claim 3

A receptacle as defined in claim 1, wherein said additional wall means comprises a material of a strength and elasticity on the order of said strength and elasticity of the dividing wall means.

Claim 4

A receptacle as defined in claim 1, wherein at least one of said wall means comprises a plastic such as polypropylene, polyethylene and the like.

Claim 5

A receptacle as defined in claim 1, wherein at least one of said wall means comprises metal.

Claim 6

A receptacle as defined in claim 1, wherein at least one of said wall means comprises a plastic combined with at least one metal layer.

Claim 7

A receptacle as defined in claim 1, wherein said weakened portion of the dividing wall means is shaped so as to form a notch in the latter.

Claim 8

A receptacle as defined in claim 1, wherein the strength of said weakened, substantially linear portion relative to the strength of other portions of said dividing wall means and to the strength of said additional wall means is such that said weakened portion will rupture before occurrence of any permanent deformation in said other portions and in said additional wall means.

Claim 9

A receptacle as defined in claim 1, wherein said dividing wall means comprises a convex portion facing said main chamber; said convex portion being effective to increase resistance of said dividing wall means to bending in the direction away from said main chamber.

Claim 10

A receptacle as defined in claim 8, wherein said dividing wall means comprises a concave portion facing said secondary chamber to facilitate egress of said flowable substance from said secondary chamber.

Claim 11

A receptacle as defined in claim 1, including a ram movable into said secondary chamber, said ram being provided with a bottom having a shape complementary to the shape of said dividing wall means.

Claim 12

A receptacle as defined in claim 1, including a perforated wall defining said main chamber at one end thereof remote from said secondary chamber; a pouch located outside said main chamber with one of its sides contacting said perforated wall, said pouch being adapted to contain a third, flowable substance; and an element movably mounted on said receptacle and arranged to operatively contact the other side of said pouch so as to hold the latter in place, said element being shiftable towards said perforated wall and said pouch to exert pressure thereon and cause said pouch to burst.

Claim 13

A receptacle as defined in claim 11, wherein said movable element is in the form of a cap.

Claim 14

In a receptacle provided with a main chamber adapted to receive a first substance and further provided with at least one secondary chamber adapted to initially receive a second flowable substance to be subsequently mixed in said main chamber with said first substance for producing a mixture such as a dental preparation, said substances being capable of reacting upon each other; a container having said main chamber therein adjacent one of its ends and having said secondary chamber therein adjacent its other end; a dividing wall forming a unit with said container and extending across the latter intermediate the ends thereof so as to normally separate said main and secondary chambers from each other; and at least one weakened, substantially linear portion in said dividing wall of said unit; said dividing wall comprising material of a strength and elasticity such that when predetermined buckling forces act thereon, said dividing wall will rupture along said weakened portion and a gap will be formed therein for transfer of said second substance from said secOndary chamber to said main chamber, but upon termination of the action of said buckling forces said gap will be closed to again separate said main and secondary chambers from each other.

Claim 15

In a receptacle provided with a main chamber adapted to receive a first substance and further provided with at least one secondary chamber adapted to initially receive a second flowable substance to be subsequently mixed in said main chamber with said first substance for producing a mixture such as a dental preparation, said substances being capable of reacting upon each other; a container having said main chamber therein adjacent one of its ends and having said secondary chamber therein adjacent its other end; a dividing wall forming a unit with said container and extending across the latter intermediate the ends thereof so as to normally separate said main and secondary chambers from each other; and at least one weakened, substantially linear portion in said dividing wall of said unit; said dividing wall comprising material of a strength and elasticity such that when predetermined buckling forces act thereon, said dividing wall will rupture along said weakened portion and a gap will be formed therein for transfer of said second substance from said secOndary chamber to said main chamber, but upon termination of the action of said buckling forces said gap will be closed to again separate said main and secondary chambers from each other.

Claim 16

A receptacle as defined in claim 13, wherein said dividing wall is integral with said container.

Claim 17

A receptacle as defined in claim 14, wherein the thickness of said dividing wall in general is on the order of 1 to 2 mm, but the thickness of said weakened portion thereof is on the order of 0.1 to 0.5 mm.

Claim 18

A receptacle as defined in claim 13, including a removable element for closing and opening said one end of the container.

Claim 19

In a receptacle provided with a main chamber adapted to receive a first substance and further provided with at least one secondary chamber adapted to initially receive a second, flowable substance to be subsequently mixed in said main chamber with said first substance for producing a mixture such as a dental preparation, said substances being capable of reacting upon each other; a container having said main chamber therein adjacent one of its ends; a hollow member inserted in said container at the other end thereof and having said secondary chamber therein; a bottom wall on said hollow member, said bottom wall being adapted to normally separate said main and secondary chambers from each other; and at least one weakened, substantially linear portion in said bottom wall of the hollow member; said bottom wall comprising material of a strength and elasticity such that when predetermined buckling forces act thereon, said bottom wall will rupture along said weakened portion and a gap will be formed therein for transfer of said second substance from said secondary chamber to said main chamber, but upon termination of the action of said buckling forces said gap will be closed to again separate said main and secondary chambers from each other.

Claim 20

In a receptacle provided with a main chamber adapted to receive a first substance and further provided with at least one secondary chamber adapted to initially receive a second, flowable substance to be subsequently mixed in said main chamber with said first substance for producing a mixture such as a dental preparation, said substances being capable of reacting upon each other; a container having said main chamber therein adjacent one of its ends; a hollow member inserted in said container at the other end thereof and having said secondary chamber therein; a bottom wall on said hollow member, said bottom wall being adapted to normally separate said main and secondary chambers from each other; and at least one weakened, substantially linear portion in said bottom wall of the hollow member; said bottom wall comprising material of a strength and elasticity such that when predetermined buckling forces act thereon, said bottom wall will rupture along said weakened portion and a gap will be formed therein for transfer of said second substance from said secondary chamber to said main chamber, but upon termination of the action of said buckling forces said gap will be closed to again separate said main and secondary chambers from each other.

Claim 21

A receptacle as defined in claim 17, wherein said hollow member is bowl-shaped.

Claim 22

A receptacle as defined in claim 17, wherein said container has an internal, bead-like projection therein positioned intermediate the ends of said container and adapted to engage said hollow member.

Claim 23

A receptacle as defined in claim 17, wherein said hollow member has an external projection thereon for engaging said container when inserted in the latter.

Claim 24

A receptacle as defined in claim 20, wherein said external projection is located in the area of said bottom of the hollow member.

Claim 25

A receptacle as defined in claim 17, wherein said container is of substantially tubular shape.

Claim 26

A receptacle as defined in claim 17, wherein said hollow member is in the form of a piston movable through said main chamber to said one end of the container.

Claim 27

A receptacle as defined in claim 23, including a closure element at said one end of the container, said closure element being removable for expelling the contents of said main chamber therefrom by means of said hollow member.

Claim 28

A receptacle as defined in claim 23, including a nozzle-shaped extension at said one end of the container for squirting contents of said main chamber through said nozzle-shaped extension by means of said hollow member.