US2006045624A1PendingUtilityA1

Screed heating arrangement

42
Individually held — no corporate assignee on recordPriority: Oct 30, 2002Filed: Oct 28, 2005Published: Mar 2, 2006
Est. expiryOct 30, 2022(expired)· nominal 20-yr term from priority
Inventors:James J. Nelson
E01C 19/407E01C 19/4833E01C 2301/10
42
PatentIndex Score
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Cited by
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References
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Claims

Abstract

A screed heating arrangement is provided for a screed assembly that is towed behind a paving machine. The screed heating arrangement includes at least one electric heater bonded to an upper surface of a screed plate.

Claims

exact text as granted — not AI-modified
1 - 21 . (canceled)  
   
   
       22 . A screed assembly comprising: 
 at least one screed section that includes a screed plate positioned between an upper surface and a lower surface; and    a screed heating arrangement that includes a thin sheet electric heater bonded to the upper surface with an adhesive bonding material.    
   
   
       23 . The screed assembly of  claim 22  wherein the thin sheet electric heater includes an outer layer made of a material that is damage resistant to fuel oil, diesel fuel, oil and solvents.  
   
   
       24 . The screed assembly of  claim 22  wherein the bonding material has a melting temperature that is greater than a conventional screed assembly operating temperature.  
   
   
       25 . The screed assembly of  claim 22  including a layer of insulation covering the thin sheet electric heater.  
   
   
       26 . The screed assembly of  claim 22  wherein the thin sheet electric heater is operable to flex with the screed plate.  
   
   
       27 . The screed assembly of  claim 22  wherein the bonding material fills porosities in the upper surface of the screed plate.  
   
   
       28 . The screed assembly of  claim 26  wherein the bonding material has a melting temperature that is greater than a conventional screed assembly operating temperature.  
   
   
       29 . The screed assembly of  claim 28  wherein the thin sheet electric heater is operable to flex with the screed plate.  
   
   
       30 . A method making a screed assembly, comprising the steps of: 
 selecting a bonding material with a melting temperature that is greater than a screed assembly operating temperature;    positioning the bonding material between a thin sheet electric heater and an upper surface of a screed plate;    heating the bonding material, the thin sheet electric heater and the upper surface of the screed plate sufficiently to melt the bonding material; and    cooling the bonding material, the thin sheet electric heater and the upper surface of the screed plate.    
   
   
       31 . The method of  claim 30  wherein the positioning and heating steps includes a step of filling porosities in the upper surface of the screed plate with the bonding material.  
   
   
       32 . The method of  claim 30  including a step of protecting the electric heater from fuel oil, diesel fuel, oil and solvents at least in part by covering the electric heater with an outer protective layer.  
   
   
       33 . The method of  claim 30  including a step of insulating the electric heater at least in part by positioning a layer of insulation adjacent the electric heater.  
   
   
       34 . The method of  claim 33  including a step of protecting the electric heater from fuel oil, diesel fuel, oil and solvents at least in part by covering the electric heater with an outer protective layer.  
   
   
       35 . The method of  claim 34  wherein the positioning and heating steps includes a step of filling porosities in the upper surface of the screed plate with the bonding material.  
   
   
       36 . A method of operating a screed assembly, comprising the steps of: 
 heating a screed plate with an electric heater at least in part by conducting heat from an electric heater, through an adhesive layer, to an upper surface of a screed plate; and    applying heat to a paving material with the screed plate.    
   
   
       37 . The method of  claim 36  including a step of flexing screed plate during the applying step; and 
 flexing the electrical heater with the screed plate.    
   
   
       38 . The method of  claim 36  wherein the heating step includes a step of maintaining a temperature of the adhesive layer below its melting temperature.  
   
   
       39 . The method of  claim 38  including a step of flexing screed plate during the applying step; and 
 flexing the electrical heater with the screed plate.

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