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Roll Top Backpack
=================
.. only:: html
.. contents::
.. figure:: roll_top_backpack_front.jpg
:align: center
This is a simple backpack with a roll top closure.
The pictures show this backpack as being sewn completely by hand: this
was because of some specific constraints of the project (mentioned in
the blog post), and it shows that MYOG as a hobby can be accessible even
when lacking a sewing machine.
Most of the constructions could of course be done by machine, except for
the step where the leather-ish protection is attached to the bottom, but
in that case I think it would be easier to bind the raw edges instead of
felling them, and using the variant with box corners instead of a
separate bottom.
Materials
---------
Fabric
^^^^^^
* 1 m outer fabric (e.g. waxed canvas);
* 1 m lining fabric (e.g. lighter canvas);
* 30 cm leather-like material for reinforcements.
Notions
^^^^^^^
* 2.1 m 25 mm webbing;
* 1.6 m 50 mm webbing;
* 4 50 mm D-rings;
* 2 25 mm D-rings;
* glue suitable for the leather-like material;
* strong sewing thread;
Pattern
-------
Download the pattern from :download:`roll_top_backpack.val`.
The file is set up to only print the pattern pieces for the bottom,
strap support and webbing cover, also available as a tiled PDF in A4
format: :download:`roll_top_backpack-A4.pdf`; everything else are just
rectangles, and their measurements can be taken from the Variables Table
in valentina.
Instructions
------------
Cutting
^^^^^^^
Cut all pieces as indicated on the patter, either the basic pieces or
the ``bc`` variants if making the `Box Corners`_ variant.
Back preparation
^^^^^^^^^^^^^^^^
.. note:: Optionally add a molle pattern to the back, to be able to
attach some removable padding.
Cut 7 pieces of 25 mm webbing as wide as the back (including
allowances); starting 6.5 cm from the base put them at one webbing
width of distance from each other over the bottom back piece.
Mark a line in the center, and lines at every 4 cm on each distance, and
sew, backstitching over each piece.
If desired, sew similar pieces of webbing to the lower part of the
p
other panels.
Cut 2 pieces of 50 mm webbing 80 cm long, fold them in half and slide
two wide D-rings in each of them. Sew them in place as close to the
D-ring as possible.
Optionally whipstitch or topstitch the edges of the webbing, making them
a single strap of double thickness.
Sew the webbing pieces to the allowance at the top of the bottom back
piece, at 4 cm from the center.
Cut a piece of 25 mm webbing, 70 cm long, sew it to the allowance at the
top of the bottom back piece, right at the center.
Cut two pieces of 25 mm webbing, 70 cm long, put them on each strap
support so that one edge goes from one corner to the middle of the long
side and there are 5 cm of webbing beyond the long side.
Fold the strap support in half, right sides facing, and sew at 1 cm from
the long edge.
Turn inside out, topstitch all around the webbing.
Put the strap support on top of the bottom back, 5 cm from the bottom,
with the webbing facing up, and sew in the allowance.
Trim the excess webbing.
Right sides together, put the top back piece over the bottom back and
sew. Press the allowances up.
Front preparation
^^^^^^^^^^^^^^^^^
Cut 10 cm of 25 mm webbing, put two D-rings in it, fold it in half and
sew as close to the rings as possible.
Optionally whipstitch the two sides.
Put it in the center of the front piece, in such a way that the top
of the D-rings aligns just below the level of the seam in the back.
Sew a 2 cm × 2 cm square at the bottom of the webbing, plus diagonals
for strenght.
Put the webbing cover so that it covers the square seam and the raw ends
of the webbing, and appliquestitch it in place.
Structure
^^^^^^^^^
Put the back over the back lining, wrong sides together, alinging it at
the bottom edge, centering it between the side edges so that there is 1
cm of lining excess on each side, and making sure that at the top the
back is 2 cm longer than the lining.
Put one side lining on top of one side, aligned at the bottom and with 2
cm of excess side compared to the lining.
Put the side on top of the back, outer / fabric sides together, aligning
the side of the side with that of the back outer.
Sew the side seam at 2 cm from the back lining edge (i.e. 1 cm from
every other edge).
Press the seam open, then press the allowance of the back lining in
half, press the seam towards the side and fell.
With the body still inside out, put the outer base on the base lining,
wrong sides together, so that the outer is centered on the lining.
Starting from the corners put the base in the body, aligning the edges of
the body with the edge of the outer base and taking care to keep the
corners neat. Sew at 2 cm from the base lining edge.
Press the seam towards the sides and fell.
Fold down the fabric at the top towards the lining, twice, forming a
hem, hemstitch it in place.
Reinforcements
^^^^^^^^^^^^^^
Cut three rectangular pieces of reinforcement material, 3 cm wide and 2
cm tall, fold them in half and sew them over the end of the straps.
Cut the bottom piece F out of reinforcement material, glue the side tabs
closed to form a parallelepipedal open on the top.
Applique-stitch the reinforcement to the bottom of the backpack, making
sure to only catch the fabric and not the lining.
.. tip:: depending on the material this reinforcement could be glued to
the backpack instead of being sewn, but this would make it harder to
change it later in case it was ruined from use.
Variants
--------
Bound raw edges
^^^^^^^^^^^^^^^
Instead of flat-felling the raw edges, you can cut every piece with the
same sewing allowance of 1 cm, sew the pieces as instructed and then
bind the raw edges with bias or straight tape.
Box corners
^^^^^^^^^^^
Instead of a separate bottom you can make the front and back pieces
longer and add a seam at the center of the bottom; this will make the
bottom of the pack a bit less structured, but can be significantly
easier to sew.
To do so, instead of pieces A, A1, B and D1 cut the pieces Abc, A1bc,
Bbc and D1bd, and skip piece E and E1.
Sew the sides of the backpack as instructed above, aligning the pieces
from the top, when the instructions
Gallery
-------
.. figure:: roll_top_backpack_back.jpg
:align: center
|
