Saturday, June 27, 2009


Here is the second consequence of the Tomoko Twist Tournament.

The twist is obvious this time; it is on the walls, both inside and out.

This model could really do with some good diagrams, step fold photos or a video. Perhaps I will get around to it soon. Perhaps not. There are so many other things to do - like more folding.

There are two crease patterns. The first one is sufficient for many types of paper, the second one adds extra creases which made the side walls cave in slightly instead of bowing outwards. With some types of paper this is a problem.

Once you have made the creases you will probably have some trouble getting the model together. It has to be eased up as it wants to fly open until it has been folded for a few hours and the creases "set".

The key to the whole thing is to work from the Y shaped mountain folds on opposite sides and the diagonals on the other two sides. To begin with, fold the forks of the Y only. This will produce a piece which stands up above the top of the walls. This will become the roof and handle. The stem of the Y is only folded down and across the top of the box after the four side flaps have been folded under around the box and secured. So fold them first. I use hair pins to keep the folded over side tabs from unfolding until I compete the model.

Explaining how to make the "handle" at the top is a little hard to explain in words, but I will try.

It is achieved by sliding the top triangle shaped pieces together with the pointed flaps going under the opposite piece. Then the triangles are folded down on either side. The valley crease at its base is lifted in order to do this and then pushed down again to form the handle.

The result is a lid which is not as firm as it would be if a flap from one side were folded over and into a pocket on the other side. For most purposes it is quite firm enough. The pieces want to fly upwards far more than they want to push out. If you look carefully at the photo you will see that the center of the tucked under triangle on the handle is not quite flush with the flap it is tucked under. I don't think it spoils the look of the handle too much.

I am sure that sounds like esoteric mud! Trying to explain a 3D process in words is very difficult. Be assured that I will diagram this, and a truck-load of other models on this site, just as soon as I can find time between design flights. One day I might finish the origami book I started over a year ago. If I could just stop having folding ideas that I cannot leave alone .......


I am in the process of planning another trip to Mexico in August, September, October. I expect to spend most of my time in various places in Jalisco State, including Guadalajara. I would be happy to visit any folder or folding group within reasonable distance of this area. If you want to issue an invitation please leave a message here and I will reply off site.

And for my Spanish-speaking friends, permítame practicar mi español.

Estoy planeando un viaje a Mexico después de que el año escolar comienza de nuevo. Espero estar en varios lugares en Jalisco, incluida Guadalajara. Yo sería feliz de visitar cualquier grupo papiroflexia o persona en este ámbito. Por favor, deje un mensaje aquí y yo la respuesta fuera de sitio.


Once started on a mission to create something I frequently end up creating several different things as a consequence of the mental stimulation. Sometimes the connection is clear, sometimes it is subtle and other times there is no apparent connection whatever. Those cases usually arise as a folding accident or because I take time out from the challenge which is occupying me.

The Tomoko Twist Challange produced one creation which has an obvious connection to the challenge which spawned it and one which is more subtle.

We will start with the oblique triangle sided box shown here. It has obvious design similarities to the box of the last posting but the mode of construction is actually quite different.

The twist is on the floor of the box. The walls are held together by tucking the side tabs in between the wall sections. The top is covered by tucking the top tabs under the adjacent flap in a clockwise direction. The petals sandwich the flap between it and the tab underneath.

The crease pattern has some lines in muted tones. These are additional creases which may be added for thin paper or if you want the walls to be extra sturdy. They are generally not needed.

The Tomoko Twist Transformation Trials: 2

Here is a third lid for the American Letter sized Triangle Sided Twist Box. It has a small insert which matches the color of the base. The insert is made from a square sheet of paper with a width which is equal to two of the nine sections of the lid.

This lid and base confirmed that the best sizing for 20lb copy paper is American Legal size minus 1/8 inch for the base and standard American Legal size for the top. These two fit perfectly: not too tight, not too loose.

Here are the crease patterns for both parts.