Package making – Gas filling and/or evacuating of receptacle and closing
Patent
1976-06-18
1978-09-19
Culver, Horace M.
Package making
Gas filling and/or evacuating of receptacle and closing
53403, 73 78, 156 94, 156145, 222 4, 273 61D, A63B 4112, A63B 4700, G01N 312, G01N 314
Patent
active
041143507
ABSTRACT:
A method and apparatus is disclosed for adjusting the resilience of a hollow ball having an internal pressure. A ball, particularly a tennis ball, is held in a confined position. A mixture of inflating medium and sealant material is injected from an aerosol container into the tennis ball. A ball test gauge is incorporated within a ball holder to enable the player to continuously and simultaneously determine the necessity for increasing or decreasing the internal pressure of the tennis ball in order to achieve the desired resilience. The frame structure is provided for fixing the storage canister or aerosol container in a stationary relationship with respect to the ball holder. A combination of elements is then provided for adjusting the internal pressure within the tennis ball.
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patent: 4031688 (1977-06-01), Wasserman
patent: 4073120 (1978-02-01), Berggren
Culver Horace M.
Markva Neil F.
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