Canopies and Canopy Specifications.
The Dutch blind shape is constructed from four frames (up to 1m projection, or five frames if larger) of anodised aluminium extrusions connected together by metal or nylon components riveted into the extrusion.
The profile of the aluminium has a channel into which a PVC extrusion is inserted and to which the blind fabric is stapled. These staples are then covered by means of a self sealing ‘hydem’ PVC tape. A retractable Dutch blind should be housed beneath a cover board (either aluminium or PVC) with end cheeks to prevent the fold of the cover from filling with rainwater.
Heavy duty nylon cord is fed through three pulleys attached to the back frame and brought down to the front frame. The cord is held in position by winding around a cleat fitted out of a child’s reach.
Gear and Electric Operation
These options can be fitted into a tube mounted beneath the top frame around which the cord winds to raise/lower the blind. This is especially useful when operating large and heavy blinds.
Anodised aluminium extrusion (SAA or powder coated) to make framework, incorporating a channel to house the PVC insert.
Small radius corner with two tongues that insert to the extrusion to join legs and cross members. These are produced from either alloy or glass filled nylon.
A front and back hinge connected by either two or three middle hinges, depending on the projection, and joined together with alloy hinge pins. All the hinge pieces have a tongue for inserting into the extrusion and riveted.
Heavy duty with nylon wheel to operate the raising and lowering of the blind. Originally fitted to the extrusion by means of a stamped metal pulley plate. This was superseded by the tuning fork which lowered the cord beneath the fold of the blind fabric to reduce the effect of chafing as do corner braces, a glass filled nylon or alloy component which fastens at an angle across the corner of the frame. This not only carries the pulleys and cord but holds the frame square and reinforces its strength. On smaller blinds these are generally fitted to the front and back frames only but on large projections they should be fitted to all frames to improve rigidity.
Made from alloy or glass filled nylon to which cord is fastened to hold blind in position out of a child’s reach.
Top Fix Bracket
Formed anodised aluminium bracket to allow both top and back fixing. This holds the back frame of the blind and is used in conjunction with a cover board.
Face Fix Bracket
As above but back fixing only.
Stand off bracket
Used when there is a gap between the leg of the blind and the wall. Two stand off brackets are inserted into a cut length of Dutch Blind extrusion. One is bolted to the back hinge – the other is screwed to the wall. Made from alloy or nylon.
Centre leg bracket
Used on wider (over 5m) Dutch blinds to prevent sagging of the extrusion and adding rigidity to the framework. The centre leg can be fitted wherever a suitable wall fixing is available. Available in alloy or nylon.
Nylon Dutch Extrusion Joiner
Fits inside the extrusion and held by rivets in order to butt lengths of extrusion together.