US4487641A — Methods of and apparatus for making a rodent and …

Claim 1

Independent Claim 159 words

A method of making a laminate which is suitable for use in a cable sheath system, said method including the steps of: preheating a strip of a corrosion-resistant metallic material, which has at least a predetermined chromium content and a relatively high elongation, an oxide surface layer, and a relatively coarse outer surface, to a temperature within a predetermined range; moving a composite strip, which comprises a first adhesive material and a second adhesive material, and the strip of metallic material into engagement with each other with the first adhesive material engaging the strip of metallic material; while exposing the composite strip and the strip of metallic material to a first temperature and to a predetermined pressure; and then exposing the composite strip and the strip of metallic material to a second temperature that is higher than the first and to the predetermined pressure to form a laminate comprising the composite adhesive strip and the strip of metallic material.

Claim 2

Independent Claim 159 words

A method of making a laminate which is suitable for use in a cable sheath system, said method including the steps of: preheating a strip of a corrosion-resistant metallic material, which has at least a predetermined chromium content and a relatively high elongation, an oxide surface layer, and a relatively coarse outer surface, to a temperature within a predetermined range; moving a composite strip, which comprises a first adhesive material and a second adhesive material, and the strip of metallic material into engagement with each other with the first adhesive material engaging the strip of metallic material; while exposing the composite strip and the strip of metallic material to a first temperature and to a predetermined pressure; and then exposing the composite strip and the strip of metallic material to a second temperature that is higher than the first and to the predetermined pressure to form a laminate comprising the composite adhesive strip and the strip of metallic material.

Claim 3

Dependent Claim 27 words

The method of claim 1, wherein said metallic material comprises an iron-based alloy which includes chromium in the range of about 12 to 30 percent by weight.

Claim 4

Dependent Claim 27 words

The method of claim 2, wherein said metallic material is made of a metal having an elongation of 55% and a tensile strength of about 85,000 psi.

Claim 5

Dependent Claim 31 words

The method of claim 2, wherein the preheating is accomplished with a temperature which is greater than the melting point of the first adhesive material and of the second adhesive material.

Claim 6

Dependent Claim 25 words

The method of claim 4, wherein said strip of metallic material is preheated to a temperature in the range of about 400° to 550° F.

Claim 7

Dependent Claim 46 words

The method of claim 5, wherein said step of preheating enhances the oxide layer to cause said oxide layer to have sufficient adhesion to the base metal of the metallic material and to the first adhesive material to provide the laminate with a predetermined peel strength.

Claim 8

Dependent Claim 22 words

The method of claim 6, wherein the predetermined peel strength is at least three pounds per inch of width of the laminate.

Claim 9

Dependent Claim 45 words

The method of claim 6, wherein the step of exposing the composite strip and the strip of metallic material to a first temperature is accomplished by moving them between a pair of rollers which cooperate to cause them to be subjected to the predetermined pressure.

Claim 10

Dependent Claim 40 words

The method of claim 8, wherein the step of exposing the composite strip and strip of metallic material to a second temperature is accomplished by moving them between a second pair of rollers which cooperate to apply the predetermined pressure.

Claim 11

Dependent Claim 64 words

The method of claim 9, wherein said first adhesive material is a terpolymer which comprises about 85-90% by weight of ethylene, about 3-5% by weight of an acrylic acid and an acrylic acid ester, wherein said acrylic acid and said acrylic acid ester comprise about 10-15% by weight of said terpolymer, and the second adhesive material is a linear low density polyethylene plastic material.

Claim 12

Dependent Claim 42 words

The method of claim 10, wherein said first temperature is less than the melting point of the first adhesive material of the composite strip and said temperature is less than the melting point of the second adhesive material of the composite strip.

Claim 13

Dependent Claim 19 words

The method of claim 11, wherein the first temperature is in the range of about 200° to 220° F.

Claim 14

Dependent Claim 17 words

The method of claim 11, wherein the second temperature is in the range of about 280°-300° F.

Claim 15

Dependent Claim 29 words

The method of claim 11, wherein the strip of second metallic material is moved between the pairs of rollers at a line speed of about 100 feet per minute.

Claim 16

Dependent Claim 130 words

A method of making a relativley small pair size cable which is rodent and lightning resistant, said method including the steps of claim 11, and further including the steps of: advancing a core along a path of travel; enclosing the core in a strip of a metallic material which is formed into an inner shield having a longitudinal overlapped seam and which has a relatively high thermal capacity and a relatively high conductivity; corrugating the laminate; enclosing the core and inner shield with the corrugated laminate by forming the laminate into an outer shield having a longitudinal overlapped seam with the second adhesive material facing outwardly; and extruding a plastic jacket to enclose the laminate and to cause the second adhesive material to bond the jacket to the outer shield.

Claim 17

Dependent Claim 36 words

The method of claim 15, wherein the composite adhesive strip and the strip of corrosion-resistant metallic material are caused to be subjected to a pressure of about 100 psi as they are moved between the rollers.

Claim 18

Independent Claim 207 words

An apparatus for making an adhesive-metallic laminate which is suitable for use in a cable sheath system, said apparatus including; means for advancing a strip of corrosion-resistant metallic material having a relatively high elongation and at least a predetermined chromium content, an oxide surface layer, and a relatively coarse outer surface and a composite strip of first and second adhesive materials along separate paths of travel and then along a common path of travel; heating means disposed along the path of travel for the strip of corrosion-resistant metallic material for heating the corrosion-resistant metallic material to a temperature which enhances the oxide layer; first roller means disposed along the common path of travel for causing the composite adhesive strip to become engaged with the strip of corrosion-resistant metallic material such that the first adhesive material is contiguous with the corrosion-resistant material, said first roller means being maintained at a first temperature and causing a predetermined pressure to be applied to the strips; and second roller means disposed along the common path of travel for causing the engaged strips to become laminated to each other, said first and second roller means causing the strips to be subjected to the predetermined pressure and being maintained at a second temperature.

Claim 19

Independent Claim 207 words

An apparatus for making an adhesive-metallic laminate which is suitable for use in a cable sheath system, said apparatus including; means for advancing a strip of corrosion-resistant metallic material having a relatively high elongation and at least a predetermined chromium content, an oxide surface layer, and a relatively coarse outer surface and a composite strip of first and second adhesive materials along separate paths of travel and then along a common path of travel; heating means disposed along the path of travel for the strip of corrosion-resistant metallic material for heating the corrosion-resistant metallic material to a temperature which enhances the oxide layer; first roller means disposed along the common path of travel for causing the composite adhesive strip to become engaged with the strip of corrosion-resistant metallic material such that the first adhesive material is contiguous with the corrosion-resistant material, said first roller means being maintained at a first temperature and causing a predetermined pressure to be applied to the strips; and second roller means disposed along the common path of travel for causing the engaged strips to become laminated to each other, said first and second roller means causing the strips to be subjected to the predetermined pressure and being maintained at a second temperature.

Claim 20

Dependent Claim 40 words

The apparatus of claim 17, wherein said first and second roller means are maintained at temperatures within predetermined ranges to heat the strips with the temperature of said first roller means being less than that of said second roller means.

Claim 21

Dependent Claim 27 words

The apparatus of claim 18, wherein said first roller means is maintained at a temperature which is less than the melting point of the first adhesive material.

Claim 22

Dependent Claim 38 words

The apparatus of claim 18, wherein said second roller means is maintained at a temperature which is greater than the melting point of the first adhesive material and less than the melting point of the second adhesive material.

Annuity Stage	Window Opens	Payment Deadline	Surcharge Period Until	Estimated Fee	Status
3.5 Years (Year 4)	1987-12-11	1988-06-11	1988-12-11	$2000.00	Window Closed / Lapsed
7.5 Years (Year 8)	1991-12-11	1992-06-11	1992-12-11	$3760.00	Window Closed / Lapsed
11.5 Years (Year 12)	1995-12-11	1996-06-11	1996-12-11	$7700.00	Window Closed / Lapsed

Methods of and apparatus for making a rodent and lighting protective cable sheath system

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