Claims
- 1. A hot melt adhesive application machine comprising:a) a reservoir for containing adhesive material therein, b) a heated molten adhesive pump for pumping said adhesive from said reservoir, said pump suspended within said reservoir such that said heated pump body transfers heat directly into said adhesive material within said reservoir.
- 2. A hot melt adhesive application machine as claimed in claim 1 wherein said heated molten adhesive pump is driven by an air motor.
- 3. A hot melt adhesive application machine as claimed in claim 1 wherein said heated molten adhesive pump is heated by electrical resistance heating.
- 4. A hot melt adhesive application machine as claimed in claim 1 wherein heat transfer fins are conductively attached to said pump body and extend outward from said pump body into said adhesive material.
- 5. A hot melt adhesive application machine as claimed in claim 4 wherein a portion of said heat transfer fins circumscribe the interior wall of said reservoir.
- 6. A hot melt adhesive application machine as claimed in claim 5 wherein a portion of said heat transfer fins extend radially from said pump body.
- 7. A hot melt adhesive pump assembly comprising:a) an elongated pump body, b) a first open ended bore extending axially through said elongated body, c) a second blind bore open at its upper end and generally parallel to said first bore, d) an electrical resistance heating element within said second bore, e) a check valve positioned within the opening of said first bore's lower end, said check valve arranged such that molten adhesive material may flow into said first bore but can not flow outward, f) at least one discharge outlet from the upper portion of said first bore, g) a pump piston slideably received within said first bore, said piston having a central cavity, opening at the bottom end of said piston thereby fluidly communicating with said first bore, h) a check valve positioned within said piston's central cavity whereby molten adhesive may flow into said central cavity, through said check valve, but not outward through said check valve, i) at least one open port extending from the top end of said piston's central cavity and into said first whereby molten adhesive may flow through said check valve, into said central cavity and into said first bore atop said piston as said piston moves downward within said first bore, j) a pump rod slidingly received within said first bore and attached, at its lower end, to said piston whereby, translation of said pump rod within said first bore moves said piston within said first bore, k) a top cover plate affixed to the top of said pump body, said top plate having an opening therein for passage of said pump rod therethrough, l) a seal at the top of said first bore sealingly surrounding said pump rod whereby molten adhesive will not exit from said first bore, m) a motor for driving said pump rod in a reciprocating motion within said first bore.
- 8. The hot melt adhesive pump assembly as claimed in claim 7 wherein said motor is an air operated motor operated by compressed air.
- 9. The hot melt adhesive pump assembly as claimed in claim 7 wherein said motor is an electric motor.
- 10. The hot melt adhesive pump assembly as claimed in claim 7 wherein said first bore includes a fluid relief passage way extending from the top of said first bore to the exterior environment of said pump body.
- 11. The hot melt adhesive pump assembly as claimed in claim 7 wherein said first bore has a lower portion and an upper portion, said upper portion having a diameter smaller than said lower portion wherein said pump rod is sized to operate within the diameter of said upper portion of said first bore and said piston is sized to operate within the diameter of said lower portion and reciprocates therein during operation of said pump, said discharge outlet being located at the top end of said lower portion of said first bore.
- 12. The hot melt adhesive pump assembly as claimed in claim 11 wherein said piston is a self aligning within said first bore's lower portion.
- 13. The hot melt adhesive pump assembly as claimed in claim 7 including at least one discharge hose fluidly attached to said discharge port, said discharge hose having a discharge applicator fluidly attached to the free end of said hose.
- 14. The hot melt adhesive pump assembly as claimed in claim 13 wherein said discharge hose and said discharge applicator is heated by electrical resistance heating elements.
- 15. The hot melt adhesive pump assembly as claimed in claim 14 wherein each said discharge hose and said discharge applicator is separately heated.
- 16. In a hot molten material application machine having a reservoir for containing said hot molten material and a heated pump for pumping said molten material from said reservoir, an electrical resistance heating system adaptable for use with 120 volt or 240 volt AC current comprising:a) a first second and third terminal in series relation one to the other, b) a first resistance heating element electrically connected between said first and second terminal and a second resistance heating element electrically connected between said second and third terminal wherein: c) for 120 volt operation, said second terminal and said third terminal are connected to line power, and d) said first terminal is connected to said third terminal whereby said first and second heating elements are thereby arranged in a parallel circuit, and e) for 240 volt operation, said first and third terminals are connected to line power, whereby said first and second heating elements are thereby arranged in a series circuit.
- 17. The electrical resistance heating system as claimed in claim 16 wherein a thermostatic control device is placed between said third terminal and said line connection.
- 18. A hot molten material application machine having a heated pump for pumping said molten material and at least one heated hose fluidly connected to said pump at one end thereof and connected to a heated molten material applicator at its other end, said pump, said hose, and said applicator each having a separate electrical resistance heating system adaptable for use with 120 volt or 240 volt AC current comprising:a) a first second and third terminal in series relation one to the other, b) a first resistance heating element electrically connected between said first and second terminal and a second resistance heating element electrically connected between said second and third terminal wherein: c) for 120 volt operation, said second terminal and said third terminal are connected to line power, and d) said first terminal is connected to third terminal whereby said first and second heating elements are thusly arranged in a parallel circuit, and e) for 240 volt operation, said first and third terminals are connected to line power, whereby said first and second heating elements are arranged in a series circuit.
- 19. The hot molten material application machine as claimed in claim 18 wherein each electrical heating system includes a thermostatic control device placed between said third terminal and said line connection.
- 20. A hot melt adhesive application machine comprising:a) a reservoir for containing adhesive material therein, b) pump for pumping said adhesive from said reservoir, said pump submerged within said adhesive material, (1) said pump comprising a body mass having liquid pumping elements contained therein, c) means positioned within said pump body for heating said pump body mass whereby heat is conducted from said pump main body mass into said adhesive material.
- 21. The hot melt adhesive application machine as claimed in claim 20 wherein said machine further includes:a) at least one adhesive discharge hose having a discharge applicator attached the free end of said hose, c) an independently controlled heating element within each discharge hose and discharge applicator.
- 22. The hot melt adhesive application machine as claimed in claim 21 wherein said heating elements within said discharge hose and said discharge applicator are separately controlled.
- 23. In a hot molten material application machine having a reservoir for containing said hot molten material and an electrically heated pump for pumping said molten material from said reservoir such that said heated pump body transfers heat directly into said molten material within said reservoir, an electrical resistance heating system adaptable for use with 120 volt or 240 volt AC current comprising:a) a first second and third terminal in series relation one to the other, b) a first resistance heating element electrically connected between said first and second terminal and a second resistance heating element electrically connected between said second and third terminal wherein: c) for 120 volt operation, said second terminal and said third terminal are connected to line power, and d) said first terminal is connected to said third terminal whereby said first and second heating elements are thereby arranged in a parallel circuit, and e) for 240 volt operation, said first and third terminals are connected to line power, whereby said first and second heating elements are thereby arranged in a series circuit.
RELATED APPLICATIONS
This application claims the priority of Provisional Patent Application Ser. No. 60/356,869 filed on Feb. 14, 2002.
US Referenced Citations (12)
Foreign Referenced Citations (1)
Number |
Date |
Country |
0771632 |
Aug 1996 |
DK |
Provisional Applications (1)
|
Number |
Date |
Country |
|
60/356869 |
Feb 2002 |
US |