Mold structure for molding skirted closures having integral lugs on the inside surface thereof

Claim 2

A core assembly adapted in combination with a spaced surrounding female mold surface to mold a closure cap, said cap having a top wall and a depEnding skirt having formed thereon at least one generally inwardly projecting lug, said lug being adapted for releaseable locking engagement with a corresponding dent, projection or the like formed on a container neck, finish, shoulder or the like, said core assembly including a principal cylindrical core and a sleeve, said core and sleeve being adapted for relative coaxial reciprocating, telescoping engagement with each other and said female mold core, said core having a principal segmented peripheral surface at the end proximate said female mold, a recessed peripheral surface at the other end and at least one groove extending to the female mold end, said groove having a recessed surface, said sleeve including at least one edge-defined finger corresponding generally in shape to the groove and being slidably receivable in said groove as said sleeve telescopically embraces the recessed peripheral surface of said core, said finger having a radial thickness corresponding to the radial depth of said groove, the edges of said groove and its associated finger cooperating to leave a void definitive of said lug.

Claim 3

The invention as claimed in claim 1, wherein the number of lugs is two and the number of grooves and fingers are at least two.

Claim 4

a hollow, axially shiftable, cylindrical first sleeve having an inner surface slidably receptive of said principal core and defining, between said inner surface and the reduced end portion of said principal core, an annular cavity defining, in turn, said inner depending skirt of said cap, said first sleeve having a segmented peripheral surface proximate said reduced end of said core and being of reduced wall thickness at the other end and having a spaced recessed groove extending from said region of reduced wall thickness axially to the other end, and

Claim 5

a hollow, axially shiftable, cylindrical first sleeve having an inner surface slidably receptive of said principal core and defining, between said inner surface and the reduced end portion of said principal core, an annular cavity defining, in turn, said inner depending skirt of said cap, said first sleeve having a segmented peripheral surface proximate said reduced end of said core and being of reduced wall thickness at the other end and having a spaced recessed groove extending from said region of reduced wall thickness axially to the other end, and

Claim 6

a second axially shiftable, rotatable sleeve including a ring-like end extremity having an inner surface slidably receivable of the reduced thickness end of said first sleeve core and at least one finger extending away from said ring having an inner surface complementarily embrasive of said cylindrical reduced end region of said first sleeve and being generally slidably receivable in said groove, said finger having a radial thickness generally corresponding to the radial depth of said groove, said finger and groove being generally complementary when in telescoped relationship with said finger extending into said groove but leaving a void or cavity defining said lug.

Claim 7

a second axially shiftable, rotatable sleeve including a ring-like end extremity having an inner surface slidably receivable of the reduced thickness end of said first sleeve core and at least one finger extending away from said ring having an inner surface complementarily embrasive of said cylindrical reduced end region of said first sleeve and being generally slidably receivable in said groove, said finger having a radial thickness generally corresponding to the radial depth of said groove, said finger and groove being generally complementary when in telescoped relationship with said finger extending into said groove but leaving a void or cavity defining said lug.

Claim 8

A core assembly as claimed in claim 1, wherein said wider groove includes an offset wider region defined by an inclined shoulder, said wider region merging with said recessed peripheral surface of said cylindrical core.

Claim 9

A core assembly as claimed in claim 3, wherein said finger has a lateral offset shoulder positioned such that with the sleeve in fully telescoped relationship with said principal core, there is defined a space between said groove shoulder and said finger shoulder, serving as a void cavity for forming said lug.

Claim 10

The invention as claimed in claim 4, wherein said groove extends completely to the end of said core nearest said female mold.

Claim 11

The invention as claimed in claim 5, wherein said sleeve is adapted to move axially away from the female mold, followed by rotation of said cylindrical core to a position wherein the formed lug is aligned with said groove.

Claim 12

A core assembly adapted in combination with a spaced surrounding female mold surface to mold a closure cap, said cap having a top wall and a depending skirt having formed thereon at least one generally inwardly projecting lug, said lug being adapted for releaseable locking engagement with a corresponding dent, projection or the like formed on a container neck, finish, shoulder or the like, said core assembly including a principal cylindrical core, a first sleeve and a second sleeve, said core and sleeves being adapted for relative coaxial reciprocating, telescoping engagement with each other and said female mold, said first sleeve having a principal segmented peripheral surface at the end proximate said female mold, a recessed peripheral surface at the other end and at least one groove extending axially to the end proximate said female mold, said groove having a recessed surface, said second sleeve including an edge-defined finger corresponding generally in shape to the groove and being slidably receivable in said groove as said second sleeve telescopically embraces the recessed peripheral surface of said first sleeve, said finger having a radial thickness corresponding to the radial depth of said groove, the edges of said groove and its associated finger cooperating to leave a void definitive of one of said lugs.

Claim 13

A core assembly adapted in combination with a spaced surrounding female mold surface to mold a closure cap, said cap having a top wall and a depending skirt having formed thereon at least one generally inwardly projecting lug, said lug being adapted for releaseable locking engagement with a corresponding dent, projection or the like formed on a container neck, finish, shoulder or the like, said core assembly including a principal cylindrical core, a first sleeve and a second sleeve, said core and sleeves being adapted for relative coaxial reciprocating, telescoping engagement with each other and said female mold, said first sleeve having a principal segmented peripheral surface at the end proximate said female mold, a recessed peripheral surface at the other end and at least one groove extending axially to the end proximate said female mold, said groove having a recessed surface, said second sleeve including an edge-defined finger corresponding generally in shape to the groove and being slidably receivable in said groove as said second sleeve telescopically embraces the recessed peripheral surface of said first sleeve, said finger having a radial thickness corresponding to the radial depth of said groove, the edges of said groove and its associated finger cooperating to leave a void definitive of one of said lugs.

Claim 14

The core assembly as claimed in claim 7, wherein said grooves and fingers are at least two in number.

Claim 15

A core assembly as claimed in claim 8, wherein said grooves are wider proximate said recessed peripheral surface of said first sleeve.

Claim 16

The invention as claimed in claim 9, wherein said grooves extend completely to the end of said first sleeve nearest said female mold.

Claim 17

The invention as claimed in claim 10, wherein said sleeves are rotatable together, independent of said core, and said grooves define a path for freeiNg said lugs as said sleeves move axially away from the female mold.

Claim 18

The invention as claimed in claim 10, wherein said second sleeve is adapted to move axially away from the female mold, followed by rotation of both of said sleeves to a position wherein formed lugs are aligned with said grooves.

Claim 19

The core assembly as claimed in claim 7, wherein said principal cylindrical core includes one end proximate said female mold which is of reduced diameter and has threads formed thereon.

Claim 20

The core assembly as claimed in claim 7, wherein said principal cylindrical core includes one end proximate said female mold which is of reduced diameter and has threads formed thereon.

Claim 21

A mold assembly adapted in combination with surrounding female mold surface to mold a one-piece closure cap, said cap including a top wall and integral spaced inner and outer depending skirts connected by a flexible annular web, said outer skirt having formed thereon at least one generally inwardly projecting lug, said lug being adapted for releaseable locking engagement with a corresponding dent, projection or the like formed on a container neck, finish, shoulder or the like, said mold assembly including:

Claim 22

A mold assembly adapted in combination with surrounding female mold surface to mold a one-piece closure cap, said cap including a top wall and integral spaced inner and outer depending skirts connected by a flexible annular web, said outer skirt having formed thereon at least one generally inwardly projecting lug, said lug being adapted for releaseable locking engagement with a corresponding dent, projection or the like formed on a container neck, finish, shoulder or the like, said mold assembly including:

Claim 23

The core assembly as claimed in claim 15, wherein said reduced end includes threads.