Attachment means and heat transfer plate

A heat transfer plate comprising, on a first side thereof, a gasket groove extending along an edge of the heat transfer plate, an edge portion of the heat transfer plate extending between the edge and the gasket groove and being corrugated so as to comprise alternately arranged ridges and valleys as seen from the first side of the heat transfer plate, the ridges comprising a first ridge, a second ridge, a third ridge and a fourth ridge, the first and second ridges being positioned between the third and fourth ridges, the first ridge being positioned immediately adjacent the third ridge, the second ridge being positioned immediately adjacent the fourth ridge, the first ridge having a top that lies in a plane, each of the second, third and fourth ridges having a top that also lies in the plane, the edge portion comprising a gasket fastening area arranged to engage with an attachment device for fastening a gasket in the gasket groove, the gasket fastening area comprising a first one of the valleys and the first and second ones of the ridges, the first and second ridges being arranged on opposite sides of the first valley and having sides that are spaced apart by distances measured parallel to the edge, the first valley comprising a first portion with a first width measured as the distance between first parts of the sides of the first and second ridges and a second portion with a second width measured as the distance between second parts of the sides of the first and second ridges, the second portion being arranged closer to the edge than the first portion, and the second width being smaller than the first width.

An attachment device for fastening a gasket to a heat transfer plate, comprising a connection member, a first finger, a second finger and a bridge, a first connection part of the connection member located at a first end of the connection member being arranged to engage with the gasket, a second connection part of the connection member located at a second end of the connection member engaging with the bridge, the connection member having opposite sides that extend from the first end of the connection member to the second end of the connection member, a connection part of the first finger engaging with the bridge, a connection part of the second finger engaging with the bridge, the first and second fingers being arranged to extend from the bridge towards the gasket, and the connection member extending between the first and second fingers, the connection member comprising a first portion with a first width that is a distance between outermost portions of the opposite sides of the connection member in the first portion of the connection member, the connection member also comprising a second portion with a second width that is the distance between outermost portions of the opposite sides of the connection member in the second portion of the connection member, the second portion being arranged closer to the bridge than the first portion, and the second width being smaller than the first width.