Process for varnishing a card equipped with connecting pins and card obtained in this way
AssigneeThomson-CSF
InventorClaude Dalencon
Life of this patent
Estimating the term…
Abstract
The process makes it possible to increase the electrical insulation and corrosion protection permitting the deposition of a varnish over the entire card, including the weld areas of pins. Prior to varnishing the process consists of placing protective sheets perforated at the location of the pins and of protecting the external parts of the pins by means of a deposit of a soap-based solution. The varnish further deposited on the faces of card does not adhere to the parts of the pins protected in this way. After drying the varnish it is merely necessary to clean the pins with hot water and by brushing to remove the protective deposit.
Claims8
A process for varnishing a card equipped with connecting pins, wherein it comprises the following stages:
- the placing of protective screens on the card substrate so that it is only possible to see those parts of the pins which are external of the card, the screens being perforated at the location of the pins and with the diameter of the latter;
- spraying a soapy solution to which a colouring agent has been added on to the pins in the form of a uniform coating, the colouring agent permitting by a visual control to check the uniformity of the deposit;
- removal of the screens after drying the protective deposit of the pins;
- varnishing the card;
- cleaning with hot water to which a wetting agent has been added and brushing to remove the protective deposit for the pins, after drying the varnish.
Dependencies are inferred from the claim text.