glass lighting devices which need flame melting during manufacturing of sealing the bulb envelope the inner components which are sensitive to heat shall be moved away from the heating point After the

Glass lighting devices that require flame melting for sealing the bulb envelope need to be manufactured in a way that protects the inner components that are sensitive to heat. During the sealing process, these components are moved away from the heating point to prevent damage. Once the heating procedure is complete, these components can be moved back into their original positions.