Continuation making glass knives,
Carefully remove the fork with the glass square.
Repeat the procedure until the desired number of glass squares have been made and collected in a controlled manner.
Collect squares in the same direction as they are broken.
Yellow arrows: the direction in which they are broken.
Green arrows: the break side of the original glass strip always remains underneath.
Red lines: that's where the knife edges will be.
Function of the release button (A): This button can be used to move the rear glass holder under spring pressure and to tighten the glass square.
The rear glass holder clamps the glass square, under slight spring pressure, between the front and rear glass holders.
Turn a glass square 45 degrees (counterclockwise) and place it on the fork. Carefully place the square between the front and rear glass holders and clamp it in place using the release button (A).
Lower the clamping head (D) using the clamping lever (B) until it touches the glass square. Tighten the clamping lever (B) until the square is securely clamped. Do not use force.
Set the zip track selector (E) to '25'.
Pull out the zip-rod (K) with a smooth movement.
Place the 'fork' under the glass square.
Slowly turn the break knob (J) clockwise until the glass breaks. Then turn the breaker back again.
The square is broken here.
Support the zipper bar (K) with your right hand and at the same time move the clamping lever (B) to the starting position. This support serves to prevent the clamping head (D) from damaging the glass.
Push back zip-bar in starting position.
Turn the release button (A) back (picture is taken from the rear of the machine).
Turn the release button (A) back.
Carefully remove the fork with the two knives.
Photograph of a broken glass knife. On the bottom you can see the foot.
Here the sharp part of a knife is shown.
Here the sharp part of a knife is shown.
Always store glass knives clean and dust-free. Here the knives are pressed into a piece of plasticine.
A glass knife with waterboat mounted on an ultramicrotome.