Abstract: A container with an externally threaded neck portion is adapted to be closed with a closure having an internally threaded sidewall engaging the threads of the neck portion. The threads of the neck portion have at least a lower stop disposed at the inner end of the thread. The threads on the container neck are divided; the threads have a maximum pitch of 8 degrees. The stop on the thread on the neck portion and a stop on one part of the divided thread on the closure insure that the closure is stopped at a predetermined position relative to the container after full-threaded rotation of the closure onto the threaded neck portion has been carried out. The threads on the closure are divided by symmetrically disposed gaps. An anti-rotational stop is provided forcibly to retain the closure in its final, fully applied position while permitting the closure to be removed by the application of an initial relatively high torque.

Abstract: A manually operated actuator for a pump employs a vertical hollow chamber. A piston is vertically slidable in the chamber between a bottom position at which no pumping action can take place and a top position at which pumping action can occur. The piston and the chamber are contained in a housing. A trigger is pivotally secured in the housing and is connected to the piston. The trigger has a first position at which the piston is held in the bottom position and has a second position at which the piston is held in the top position. The trigger is normally in the first position and is manually movable into the second position. A spring device is disposed in the housing, being secured to the trigger and spaced from the chamber and piston. The device biases the trigger into the first position whenever there is no manual pressure on the trigger.

Abstract: A container with a threaded neck portion is adapted to be closed with a closure engaging the threads of the neck portion. The threads of the neck portion have at least two stops disposed at opposite ends of the threads. The threads may be continuous or interrupted but have a maximum pitch of 8 degrees. The two stops of the threads on the neck portion insure that the closure is stopped at a predetermined position relative to the container after full-threaded rotation of the closure onto the threaded neck portion has been carried out.

Abstract: A method for threading a closure having cylindrical walls which includes securing the closure in a stationary nest, inserting a threading tool having indentions on the outside thereof into the interior of the closure, moving the closure into a ring having projecting threads on the inside thereof around the outside walls of said closure, moving the threading tool into contact with the interior portion of the closure upon which threads are to be formed, and moving the threading tool around the interior portion of the stationary closure in an orbital path to form threads in the closure without rotating the threading tool about the threading tool axis.