US3635619A — Electrically heated compound molding machine

Claim 1

Independent Claim 282 words

An electrically heated compound molding machine for in-place molding of cap liners comprising: a liner curing turret mounted for rotation on a vertically disposed axis; clamp punch assemblies mounted on the turret for receiving caps having a predetermined quantity of thermally curable material therein; means for feeding the caps to successive clamp assemblies as the turret rotates about its axis; upper clamping members of said assemblies being mounted in fixed position on the periphery of said turret and having a die element adapted to fit snugly into said cap to shape the thermally curable material in said cap into a liner disc on the cap bottom and cap skirt when the clamping members are closed together; first heating means having a thermal capacity much less than said upper clamping members and mounted adjacent said upper clamping members and between said clamping members and said turret for imparting heat by direct conduction to each said upper clamping member whereby each said upper clamping member acts as a heat equalizing means between said heating means and said die element; lower clamping members mounted for vertical reciprocation in a bore in a support member whereby operating means causes vertical reciprocation of said lower member to open and close the clamping members for receiving and discharging the caps; second heating means mounted near said lower clamping member and extending almost around said turret and said clamp assemblies for imparting heat to said lowEr clamping member; and thermal control means having a heat sensitive element for intermittently sending current to said first and second heating means whereby said upper and lower clamping members are maintained at a temperature near the curing temperature of said thermally curable material.

Claim 2

Dependent Claim 282 words

An electrically heated compound molding machine for in-place molding of cap liners comprising: a liner curing turret mounted for rotation on a vertically disposed axis; clamp punch assemblies mounted on the turret for receiving caps having a predetermined quantity of thermally curable material therein; means for feeding the caps to successive clamp assemblies as the turret rotates about its axis; upper clamping members of said assemblies being mounted in fixed position on the periphery of said turret and having a die element adapted to fit snugly into said cap to shape the thermally curable material in said cap into a liner disc on the cap bottom and cap skirt when the clamping members are closed together; first heating means having a thermal capacity much less than said upper clamping members and mounted adjacent said upper clamping members and between said clamping members and said turret for imparting heat by direct conduction to each said upper clamping member whereby each said upper clamping member acts as a heat equalizing means between said heating means and said die element; lower clamping members mounted for vertical reciprocation in a bore in a support member whereby operating means causes vertical reciprocation of said lower member to open and close the clamping members for receiving and discharging the caps; second heating means mounted near said lower clamping member and extending almost around said turret and said clamp assemblies for imparting heat to said lowEr clamping member; and thermal control means having a heat sensitive element for intermittently sending current to said first and second heating means whereby said upper and lower clamping members are maintained at a temperature near the curing temperature of said thermally curable material.

Claim 3

Dependent Claim 73 words

An electrically heated compound molding machine for in-place molding of cap liners as set forth in claim 1 in which said first heating means comprises: a ring-shaped member made of material having higher thermal conductivity and lower specific heat than said upper clamping member and said die element; resistance elements embedded in said ring-shaped member; and terminal elements connected to said resistance elements whereby electricity is conducted to and from said resistance elements.

Claim 4

Dependent Claim 99 words

An electrically heated compound machine for in-place molding of cap liners as set forth in claim 1 in which said upper clamping member comprises: an upper thermal transfer element having higher specific heat than said first heating means and mounted adjacent to and in close contact with said first heating means whereby heat is transferred by conduction from said heating means to said thermal transfer means; and said die element being mounted adjacent to and in close contact with said upper thermal transfer element whereby heat may be transferred between said upper thermal transfer element and said die element.

Claim 5

Dependent Claim 48 words

An electrically heated compound molding machine for in-place molding of cap liners as set forth in claim 3 in which said upper thermal transfer element comprises: a base member having four locator pins extending downwardly from said base member for centering a cap on said lower clamping member.

Claim 6

Dependent Claim 121 words

An electrically heated compound molding machine for in-place molding of cap liners as set forth in claim 3 in which said thermal control means for said first heating means comprises: a thermal plug made of a material having high thermal conductivity and fitting snugly into a passageway extending through said upper thermal transfer element between said die element and said first heating means; a heat-sensitive element in said plug for determining the temperature of a part of said plug; and electrically conductive leads extending from said heat-sensitive element for conducting electrical information as to temperature level from said heat sensitive element whereby the amount of heat generated in said first heating means is controlled by the temperature of said heat-sensitive element.

Claim 7

Dependent Claim 46 words

An electrically heated compound molding machine for in-place molding of cap liners as set forth in claim 5 and having, additionally, ring support means for suspending said second heating means; and removable support elements attached to said support ring for maintaining said support ring in position.

Claim 8

Dependent Claim 32 words

An electrically heated compound molding machine for in-place molding of cap liners as set forth in claim 5 in which: said heat-sensitive element in said plug is located near said die element.

Claim 9

Dependent Claim 73 words

An electrically heated compound molding machine for in-place molding of cap liners as set forth in claim 6 in which said support ring means comprises: a flat sector of over half a circle having slots therein; and connecting means mounted in said slots for supporting said second heater means whereby said second heater may be slid from a position near said lower clamping members to a position remote from said lower clamping members.

Claim 10

Dependent Claim 105 words

An electrically heated compound molding machine for in-place molding of cap liners as set forth in claim 1 in which said second heating means comprises: an arcuate heater element mounted around said lower clamping members for imparting heat to said lower clamping members and having resistance heating means extending along the length of said arcuate heater element; and reflector means extending along the length of said resistance heating means and mounted on the opposite side of said rEsistance heating means from said lower clamping members whereby heat given off by said resistance heating means is reflected by said reflector means toward said lower clamping means.

Claim 11

Dependent Claim 62 words

An electrically heated compound molding machine for in-place molding of cap liners as set forth in claim 1 in which: a bolt having a compression spring mounted under its head is threaded into said die and the compression spring under its head rests against the upper part of said turret for fixedly mounting said die and upper clamping means on said turret.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1975-01-17	1975-07-19	1976-01-18	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1979-01-17	1979-07-19	1980-01-18	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1983-01-17	1983-07-19	1984-01-18	$7700.00	Window Closed / Lapsed

Electrically heated compound molding machine

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