Cap assembly having inside seal

A resealable container assembly comprising:

• a container that is either metal or glass and closed at a first end so as to be configured for holding an associated fluid at a preselected pressure therein, and having an opening at a second end, the opening having an inner, first diameter through which the associated fluid is introduced into and poured from the container, the container having thread portions adjacent the second end along an external surface thereof;
• a metal cup-shaped cap having an end wall, and a perimeter sidewall extending from the end wall, wherein the cap includes circumferentially spaced lugs dimensioned for selective twist-on/twist-off receipt relative to the thread portions of the container;
• and
• a seal adhered to an inner surface of the end wall of the cap, the seal including a continuous first axial region extending outwardly from the cap inner surface a larger extent than a remainder of the seal, the first axial region of the seal having a radially outer, external surface dimensioned for sealing engagement with a smallest inner diameter of the container opening such that the external surface of the first axial region seals the container along the smallest inner diameter of the container opening, whereby the seal formed between the first axial region and the smallest inner diameter of the container opening maintains the associated fluid within the container at pressure when the cap is twisted into threaded engagement with the container at a unitless, first numerical value equal to an on-torque maximum numerical value measured in inch-pounds and a second numerical value equal to a numerical diameter of the cap measured in millimeters, wherein the first numerical value less than one-half of the second numerical value.

A process of assembling a metal cap and one of a metal or glass container assembly so as to seal an associated fluid therein under pressure, the process comprising:

• providing a metal cap;
• providing a container having an opening with thread portions;
• providing a seal on the metal cap that extends outwardly therefrom for sealing engagement with an innermost diameter of the opening, including (i) providing a continuous first axial region extending outwardly from the cap inner surface a larger extent than a remainder of the seal, and (ii) dimensioning the first axial region of the seal to have a radially outer, external surface dimensioned for sealing engagement with a smallest inner diameter of the container opening;
• installing the cap on the container such that the sealing engagement is formed between the first axial region and the smallest inner diameter of the container opening, the sealing engagement configured to hold the associated fluid at a preselected pressure;
• and
• forming roll on pilfer proof (ROPP) thread portions on the cap while the cap is held on the container with less than 100 pounds of down force during formation of the ROPP thread portions and the sealing engagement of the first axial region with the smallest inner diameter of the container opening maintains the associated fluid within the container at pressure during the formation of the ROPP thread portions.

A process of assembling a resealable metal cap and one of a metal or glass container assembly that seals an associated fluid therein under pressure comprising:

• providing a metal cap having circumferentially spaced lugs;
• providing a container having an opening with thread portions that cooperate with the circumferentially spaced lugs of the metal cap for selective twist-on/twist-off receipt of the metal cap relative to the thread portions on the container;
• providing a seal on the metal cap that extends outwardly therefrom for sealing engagement with an innermost diameter of the opening, including (i) providing a continuous first axial region extending outwardly from the cap inner surface a larger extent than a remainder of the seal, and (ii) dimensioning the first axial region of the seal to have a radially outer, external surface dimensioned for sealing engagement with a smallest inner diameter of the container opening;
• and
• installing the cap on the container such that the sealing engagement is formed between the first axial region and the smallest inner diameter of the container opening, the sealing engagement being configured to hold the associated fluid at a preselected pressure therein with an on-torque maximum value used when the cap is twisted into threaded engagement with the container at a value measured in inch-pounds less than one-half a diameter of the cap measured in millimeters.