Heated die punch construction and control device
OwnerLarry Smith, Michael J. Hornerinventors
Life of this patent
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Abstract
Invention discloses a heated die to form long lived aperatures in upper region of plastic wrapped packages; said die featuring improved construction providing focused unidirectional heat flow to avoid package failure leading to product deterioration and package failure and disengagement with display hangers; said heat control effected by micro control of flow of energizing electricity.
Claims21
A die-punch assembly construction comprising;
- a first, hollow, elongate, tube-like member having one open end adapted to slidably and nestably receive an electric resistance cartridge heater and an opposite closed end having a die formed on the lower exterior thereof,
- a second, hollow, elongate sleeve-like member essentially surrounding said first member with minimum contact and having opposed open ends, one lower end allowing the die exterior of said first member to project axially therethrough,
- a caplike closure engaging and closing said otherwise open upper end of said second member,
- means adapted to center said first member axially respecting said second member and to urge said die exteriorly, and
- means defining air insulation voids surrounding said first tube like member.
The invention, as claimed in 19, which includes a control device for achieving a preselected incrementally timed frequency of current flow to said electric resistance heater, responsive to the temperature setting of a rheostat member having a low voltage output corresponding in value to the temperature setting, comprising the following components connected together electrically,
- a thermocouple having its sensor probe positioned in close proximity to the electric heater;
- a compensating amplifier;
- a comparator;
- a first adjustable pulse width timer;
- a second adjustable pulse width timer;
- a relay adapted to convert said incrementally timed flow of low voltage into a corresponding 110 volt/250 watt current flow directed to the electric resistance heater;
- and
- said electric resistance:
- cartridge heater,
- said compensating amplifier comprising means for converting the temperature perceived by said thermocouple to a corresponding low voltage signal for transmission to said comparator;
- said comparator including means for comparing said rheostat voltage output with the compensating amplifier voltage output and transmitting said low voltage signal to the first adjustable pulse width timer, if said rheostat voltage is higher;
- said first pulse width timer being adapted to transmit said signal for a given preselected adjustable period of time to said second pulse width timer adapted to transmit said voltage signal to said relay for a preselected adjustable period of time:
- said flow of current passing to said relay, in preselected time increments as determined by the second pulse width timer and thence converted to corresponding incremental time flow sequences of electric current sufficient to energize said heater, said flow proceeding incrementally to said electric resistance heater, wherein said current is converted to heat which rises incrementally as determined by the aforesaid interfunctioning of the comparator and the adjustable pulse width timers:
- whereby the electric resistance heater does not over heat;
- but rather the temperature gradually increases and consistently maintains that temperature as manually set on the said rheostat control, and whereby the presence of said control device yields a longer lived, consistant seal.
Dependencies are inferred from the claim text.