Plunger system, device and method

A plunger for dispensing a material from a collapsible package in a package tube, the plunger comprising:

• a main wall attachable with a plunger rod, the main wall being configured to deform when a predetermined force is applied thereto;
• and
• one or more sidewalls each extending from the main wall at an angle in relation to a longitudinal axis of the plunger, the sidewalls each having a free end with an exterior side, the exterior side of the free end of the sidewalls is spaced from an interior surface of a package tube when the plunger is received in the package tube due to the angle;
• wherein the sidewalls and the main wall define a plunger cavity configured to receive an end of a collapsible package containing a material dispensable by movement of the plunger;
• wherein a section of the sidewalls is configured to contact the interior surface of the package tube containing the collapsible package by movement of the plunger.

A method of operating a plunger to dispense a material from collapsible package in a package tube, the plunger comprising a main wall and a sidewall extending from the main wall at an angle in relation to a longitudinal axis of the plunger, the sidewall having a free end with an exterior side;

• the method comprising the steps of:
• a) advancing the plunger in the package tube so an end of the collapsible package is received in a plunger cavity defined by the main wall and the sidewall, and the free end of the sidewall is spaced from an interior surface of the package tube due to the angle;
• b) forcing the plunger against the end of the collapsible package to create a force applied to any one of or any combination of the main wall and the sidewall;
• and
• c) bending, by way of the force, the any one of or any combination of the main wall and the sidewall so that at least a radial medial point of the sidewall contacts the interior surface of the package tube.