This disclosure provides connectors for smart windows and doors. A smart window or door may incorporate an optically switchable pane. In one aspect, a smart window or door includes an insulated glass unit including an optically switchable pane. One aspect pertains to connectors such as, e.g., detachable power transfer connectors for movable doors or windows.

A method for manufacturing insulating bars made from a thermoplastic material, comprising: producing a band-shaped extrudate having a substantially rectangular cross-section from the thermoplastic material; producing an individual insulating bar or a plurality of insulating bars from the band-shaped extrudate in the longitudinal direction thereof; and severing the insulating bar or bars arrangement in the longitudinal direction thereof to provide separated insulating bars.

A method for manufacturing an insulating bar made from a thermoplastic plastics material whereof the base body has a corrugated structure comprises shaping the insulating bar as a blank having a substantially planar structure of the base body without raised portions and recesses but with the connection strips, cooling the blank to a temperature corresponding to the maximum long-term service temperature of the plastics material or lower, heating the base body to a forming temperature which, for crystalline plastics materials, is approximately 30 C. below the crystallite melting point of the plastics material or higher, and for amorphous plastics materials, is approximately 30 C. above the softening point or higher, forming the base body by a tool to produce the alternating raised portions and recesses, while retaining the geometry of the connection strips, and cooling the insulating bar to a temperature corresponding to the maximum long-term service temperature or lower.

So that insulating bars for composite profiles made from a thermoplastic plastics material may be manufactured economically with the respectively required dimensions and cross sectional shapes, in particular also having a corrugated structure of the base body, it is proposed that, in a first step, a strip-like extrudate having a substantially rectangular cross section should be produced from the plastics material and, in a subsequent step, an insulating bar arrangement having the shape of an individual insulating bar or the shape of a plurality of insulating bars that are joined together and are arranged parallel next to one another should be produced from the strip-like extrudate, and where appropriate the insulating bar arrangement should be severed in its longitudinal direction to give mutually separated insulating bars.