| 54 |
Title |
TI |
[DE] TEMPERATURREGELUNG VON HEIZELEMENTEN
[EN] Hot air welding gun control - by air temp responsive PTC resistor controlling triac for heating element |
| 71/73 |
Applicant/owner |
PA |
BALTUS RENE
|
| 72 |
Inventor |
IN |
BALTUS RENE
|
| 22/96 |
Application date |
AD |
Oct 20, 1978 |
| 21 |
Application number |
AN |
2845652 |
|
Country of application |
AC |
DE |
|
Publication date |
PUB |
Apr 30, 1980 |
33
31
32 |
Priority data |
PRC
PRN
PRD |
|
| 51 |
IPC main class |
ICM |
B29C 27/02
|
| 51 |
IPC secondary class |
ICS |
|
|
IPC additional class |
ICA |
|
|
IPC index class |
ICI |
|
|
Cooperative patent classification |
CPC |
B23K 1/012
B23K 3/0478
B29C 65/10
B29C 66/73921
B29C 66/9121
B29C 66/91317
B29C 66/91421
B29C 66/91651
B29C 66/919
G05D 23/1906
G05D 23/24
|
|
MCD main class |
MCM |
|
|
MCD secondary class |
MCS |
B23K 1/012
(2006.01)
B23K 3/047
(2006.01)
B29C 65/10
(2006.01)
G05D 23/24
(2006.01)
|
|
MCD additional class |
MCA |
B29C 65/00
(2006.01)
|
| 57 |
Abstract |
AB |
[EN] A hot air welding gun for use in welding thermoplastic articles is equipped with a triac in the supply circuit of the heating element spiral, and with a potentiometer for manual setting. The firing of the triac is controlled by a resistor with a positive temp. coefft. which responds to temp. rise and increases its resistance when the temp. should rise because of a reduction in the rate of the cold air supply. The changed resistance acts on a integrated circuit on a printed circuit board and reduces the firing pulses for the triac. This keeps the heating element spiral at the lowest temp., compatible with the air supply rate, and results in a longer life of the heating element. Damage due to fusion of the ceramic element holder at temp. exceeding 1000 degrees C is reliably eliminated. |
| 56 |
Cited documents identified in the search |
CT |
|
| 56 |
Cited documents indicated by the applicant |
CT |
|
| 56 |
Cited non-patent literature identified in the search |
CTNP |
|
| 56 |
Cited non-patent literature indicated by the applicant |
CTNP |
|
|
Citing documents |
|
Determine documents
|
|
Sequence listings |
|
|
|
Search file IPC |
ICP |
B29C 65/10
|
