Neoprene laptop sleeve: new pattern.

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+Neoprene Laptop Sleeve
+======================
+
+.. only:: html
+
+   .. contents::
+
+.. figure:: sleeve_teres.jpg
+   :align: center
+   :alt: Picture of a red neoprene laptop sleeve, with two overlapping
+      flaps with rounded edges for closure.
+
+   View A of the sleeve; see the gallery below for a picture of view B.
+
+A simple neoprene sleeve to protect laptops while carrying them inside
+bags, backpacks, etc in two views: A with rounded corners, and B
+with straight corners for laptops that are especially pointy.
+
+It can be sewn by hand or by machine; view B has tight corners and
+sewing it by hand is recommended.
+
+Materials
+---------
+
+Fabric
+^^^^^^
+
+* A piece of neoprene about as wide as the laptop and a bit more than
+  twice as high.
+
+Notions
+^^^^^^^
+
+* Strong polyester sewing thread, such as the same one used in the
+  :ref:`modular_backpack_base`;
+* elastic edge binding braid, about 2.5 times the width of the laptop;
+* regular sewing polyester thread that matches the braid.
+
+Pattern
+-------
+
+Measure snugly around the thickest part of the laptop both horizontally
+and vertically.
+
+.. only:: html
+
+   Download the :download:`valentina pattern <laptop_sleeve.val>` and
+   enter the measurements in the Variables Table.
+
+.. only:: not html
+
+   Download the `valentina pattern`_ and enter the measurements in the
+   Variables Table.
+
+   .. _`valentina pattern`: https://sewing-patterns.trueelena.org/_downloads
+
+Alternatively, for view A you can draw three rectangles: the base is
+half the circumference measurements, the top and bottom front are as
+wide as the base and 1/3 and 2/3 its height plus 3 cm respectively.
+Round all corners with a radius of 4 cm.
+
+For view B, make just one rectangle, as big as the three rectangles
+above, and round its corners with the same radius.
+
+You can also download an example pre-rendered pattern of view A for the
+Thinkpad X200, whose circumference measurements are 47 cm vertically and
+65 cm horizontally.
+
+.. only:: html
+
+   * :download:`View A, single page <laptop_sleeve_x200.pdf>`
+   * :download:`View A, tiled on A4 <laptop_sleeve_x200_tiled.pdf>`
+
+.. only:: not html
+
+   * `View A, single page
+     <https://sewing-patterns.trueelena.org/_downloads/aac84cf7f8cd40941b724ab27bf5087f/laptop_sleeve_x200.pdf>`_
+   * `View A, tiled on A4
+     <https://sewing-patterns.trueelena.org/_downloads/5015b22d0ae1c9d1a97195f8a3bff20c/laptop_sleeve_x200_tiled.pdf>`_
+
+Or view B for the Olimex Teres, with measurements 42 cm horizontally and
+
+.. only:: html
+
+   * :download:`View B, single page <laptop_sleeve_teres.pdf>`
+   * :download:`View B, tiled on A4 <laptop_sleeve_teres_tiled.pdf>`
+
+.. only:: not html
+
+   * `View B, single page
+     <https://sewing-patterns.trueelena.org/_downloads/f9b2926acdfa88dd1bb59b3d66b953d7/laptop_sleeve_teres.pdf>`_
+   * `View B, tiled on A4
+     <https://sewing-patterns.trueelena.org/_downloads/0c74ff54ef80d14da47db0bd75b883b1/laptop_sleeve_teres_tiled.pdf>`_
+
+Instructions
+------------
+
+All structural seams are done with strong thread by abutting the two
+neoprene parts and either using a wide zig-zag stitch on the machine or
+with an herringbone stitch on both sides of the fabric if sewing by
+hand.
+
+View A
+^^^^^^
+
+.. figure:: sewing_a.jpg
+   :align: center
+
+Cut parts A, B and C of the pattern in the neoprene.
+
+Carefully align part C to the side of part A and sew the side, bottom
+and other side, starting and ending just below the rounded corner of
+part C. Push the neoprene to keep it aligned when going around the
+corners.
+
+Do the same to part B, sewing the side, top and other side to the base
+A.
+
+View B
+^^^^^^
+
+.. figure:: sewing_b.jpg
+   :align: center
+
+Fold up the bottom part of the neoprene on the marked line, sew the
+sides starting from the bottom and going up until just below the rounded
+corner.
+
+Do the same to the top part of the neoprene.
+
+Both views: edge binding
+^^^^^^^^^^^^^^^^^^^^^^^^
+
+.. figure:: binding_front.jpg
+   :align: center
+
+Starting from the center of the bottom flap, cover the raw neoprene edge
+with binding braid and either topstitch it down by machine or,
+recommended for best results, whipstitch it by hand on both sides, using
+regular sewing thread in either case and going carefully around the
+corners where the flaps and base meet.
+
+.. figure:: binding_corner.jpg
+   :align: center
+
+Gallery
+-------
+
+.. figure:: sleeve_teres_open.jpg
+   :align: center
+   :alt: Picture of a red neoprene laptop sleeve, partially open with a
+      laptop visible inside.
+
+.. figure:: sleeve_x200.jpg
+   :align: center
+   :alt: Picture of a red neoprene laptop sleeve, with rounder corners
+      and currently empty.
+
+.. figure:: parts_view_a.jpg
+   :align: center
+