Claims
- 1. A machine for folding sheets of foil, the machine comprising;a) a means for controllably advancing a sheet of foil along a sheet feed direction through said machine; b) a means for folding a trailing end of said sheet such that said trailing end including a folded part and the other end left unfolded; c) a stationary knock down table for receiving said sheet of foil thereon; d) a knockdown roller for further folding said folded part against said knock down table, said roller made of soft resilient material for engaging with a top edge of said folded part thereby further folding and knocking down said folded part; and e) a means for discharging said sheet from said folding machine such that said trailing end including a layered edge and said leading edge remaining unfolded.
- 2. The machine claimed in claim 1 wherein said folded part is initially preferably an upstanding vertical section.
- 3. The machine claimed in claim 1 wherein said folded part is initially preferably an upstanding vertical section connected to a downwardly disposed tail section forming an inverted V shape.
- 4. The machine claimed in claim 1 wherein said discharge means further includes a means for flattening said folded part, to form a layered edge.
- 5. The machine claimed in claim 1 wherein said knock down roller folding said folded part into a three layered tailing edge.
- 6. The machine claimed in claim 1 wherein said knockdown roller folding said folded part into a four layered trailing edge.
- 7. The machine claimed in claim 1 wherein said knockdown roller is preferably made of a resilient foam.
- 8. The machine claimed in claim 1 wherein said folding means including a folding assembly for creasing or folding an end into said folded part.
- 9. The machine claimed in claim 2 wherein said folding assembly includes V shaped folding member and a cooperating composite blade for initially folding an end of said sheet.
- 10. The machine claimed in claim 9 wherein said folding member and cooperating composite blade forms a folded part in an end of said sheet which is preferably an inverted V shape.
- 11. The machine claimed in claim 9 wherein said composite blade including one part being a hard potion and the other part made of a non galling material.
- 12. The machine claimed in claim 11 wherein said composite blade including one part made of steel and the other part made of brass.
- 13. The machine claimed in claim 11 wherein said composite blade including one part made of steel and the other part made of ultra high molecular weight plastic.
- 14. A method of folding sheets of foil, the method comprising the steps of:a) advancing a sheet of foil through a folding machine; b) folding a trailing end of said sheet such that said trailing edge including a folded part; c) receiving said sheet on a stationary knock down table; d) further folding said folded part against said knock down table with a knockdown roller, said roller made of soft resilient material for engaging with a top edge of said folded part thereby further folding and knocking down said folded part; and e) discharging said sheet with a trailing layered edge from said folding machine wherein said other edge remaining unfolded.
- 15. The method of folding sheets of foil claimed in claim 14 further including the step after step d) of:d′) further folding said folded part into a three layered edge.
- 16. The method of folding sheets of foil claimed in said knockdown roller further folding said folded part into a four layered edge.
- 17. The method of folding sheets of foil claimed in claim 14 wherein said folded part initially is preferably an upstanding vertical section.
- 18. The method of folding sheets of foil claimed in claim 17 wherein said folded part initially is preferably an upstanding vertical section connected to a downwardly disposed tail section forming an inverted V shape.
Parent Case Info
Priority is claimed from U.S. Provisional Patent Application No. 60/214,420, filed on Jun. 28, 2000.
US Referenced Citations (13)
Provisional Applications (1)
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Number |
Date |
Country |
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60/214420 |
Jun 2000 |
US |