Mullion portion in a unit type curtain wall

Abstract From the Canadian patent

A plurality of standardized curtain wall units of rectangular shape are arrange in rows and columns with a predetermined, gap between the opposed side frame members of every two horizontally adjoining curtain wall units. For closing the gap so as to allow relative displacement of the individual curtain wall units in their own plane, a sealing band of elestic matrial has its lateral marginal edge portions engaged in a pair of opposed mounting grooves in the opposed side frame members of every two horizontally adjoining curtain wall units. The sealing band has a width less than the distance between the bottoms of the pair of opposed mounting grooves in which the sealing band is engaged. Thus …