Claims
- 1. A nozzle used for discharging viscous fluid therethrough, comprising:
- (a) a glue chamber having a nozzle opening;
- (b) a valve rod disposed in said glue chamber and having a tip end for opening and closing said nozzle opening;
- (c) a cylinder in which a piston connected to a rear end of said valve rod slide;
- (d) a pressurized air source for supplying pressurized air to said cylinder; and
- (e) a seal section disposed between said glue chamber and said cylinder and formed with a valve rod passage through which said valve rod moves, said seal section preventing communication between said glue chamber and said cylinder, said seal section including a gas flow passage through which gas is supplied to and discharged from said valve rod passage; and a gas supplier for supplying gas to said gas flow passage.
- 2. The nozzle as set forth in claim 1, wherein hot melt is supplied to said glue chamber.
- 3. A nozzle used for discharging viscous fluid therethrough, comprising:
- (a) a glue chamber having a nozzle opening;
- (b) a valve rod disposed in said glue chamber and having a tip end for opening and closing said nozzle opening;
- (c) a cylinder in which a piston connected to a rear end of said valve rod slide;
- (d) a pressurized air source for supplying pressurized air to said cylinder; and
- (e) a seal section disposed between said glue chamber and said cylinder and formed with a passage through which said valve rod moves, said seal section preventing communication between said glue chamber and said cylinder, said seal section including a gas flow passage through which gas is supplied to and discharged from said passage; and a gas supplier for supplying gas to said gas flow passage,
- wherein said gas supplier comprises an exhaust gas pipe through which exhaust gas is supplied from said cylinder.
- 4. The nozzle as set forth in claim 3, wherein said exhaust gas pipe is formed with a branch pipe through which a part of exhaust gas is released to atmosphere.
- 5. The nozzle as set forth in claim 4 further comprising a variable restriction in said branch pipe.
- 6. The nozzle as set forth in claim 4 further comprising a silencer in said branch pipe.
- 7. A nozzle used for discharging viscous fluid therethrough, comprising:
- (a) a glue chamber having a nozzle opening;
- (b) a valve rod disposed in said glue chamber and having a tip end for opening and closing said nozzle opening;
- (c) a cylinder in which a piston connected to a rear end of said valve rod slide;
- (d) a pressurized air source for supplying pressurized air to said cylinder; and
- (e) a seal section disposed between said glue chamber and said cylinder and formed with a passage through which said valve rod moves, said seal section preventing communication between said glue chamber and said cylinder, said seal section including a gas flow passage through which gas is supplied to and discharged from said passage; and a gas supplier for supplying gas to said gas flow passage;
- wherein there is provided a variable restriction between said gas flow passage and a gas source.
Priority Claims (2)
Number |
Date |
Country |
Kind |
8-028909 |
Feb 1996 |
JPX |
|
8-210703 |
Aug 1996 |
JPX |
|
Parent Case Info
This application is a divisional of U.S. application Ser. No. 08/796,705 filed Feb. 6, 1997, still pending.
US Referenced Citations (10)
Foreign Referenced Citations (4)
Number |
Date |
Country |
0 040 068 A1 |
Nov 1981 |
EPX |
38 41 474 A1 |
Jun 1990 |
DEX |
61-78460 |
Apr 1986 |
JPX |
5-97127 |
Apr 1993 |
JPX |
Divisions (1)
|
Number |
Date |
Country |
Parent |
796705 |
Feb 1997 |
|