I'm a little sceptical that those teeny magnets will have the flux density ( doesn't that sound smart?) to hold screens secure. Even with a bunch of them. I don't think the field of such a thin magnet will extend very far at all.

Alistair

> On Apr 13, 2016, at 11:57 AM, Jim Felder <jim.felder@GMAIL.COM> wrote:
> 
> I will probably try this as well, it is a good idea. These magnets are so
> small that you could probably fold a piece of duct tape in half. Two
> things: 1, you don't want to sew through duct tape or any other adhesive
> very far as you will spend way more time cleaning your machine and fixing
> the thread and sewing as the adhesive accumulates on the needle and goes
> under the cloth to the bobbin. Ask me how I know.
> 
> Secondly, the duct tape may not (or may) have enough stiffness to do the
> job. Even it it didn't by itself, you could probably sew a piece of box
> strapping in behind the duct tape and magnets to give it a little spring.
> Which, for all I know at this point, it may not really need.
> 
> Jim
> 
> On Wed, Apr 13, 2016 at 1:51 PM Richard Koerner <rjkinpb@sbcglobal.net>
> wrote:
> 
>> As you were describing your design, an idea popped into my head:
>> 
>> You could lay down a strip of 2" wide duct tape, sticky side up, but stuck
>> down on tabletop at the ends with additional tape.  Place the magnets in a
>> row at 1" spacing....hopefully the adhesion to the duct tape will keep them
>> from jumping over to each other.  When all magnets are installed, place a
>> second strip of duct tape sticky side down over the first piece of duct
>> tape, thus capturing each magnet in it's own little compartment.  A
>> sandwich.  Then trim the assembly to maybe 1" wide so it's nice and neat.
>> Now this assembly can be laid into the hem of fabric and the stitching goes
>> through the edges of the duct tape sandwich.
>> 
>> The duct tape sandwich assembly should give a little rigidity yet at the
>> same time provide flexibility so that the fabric can be rolled up or folded.
>> 
>> Just an idea.
>> 
>> Rich
>> San Diego
>> 
>> 
>> ------------------------------
>> *From:* Jim Felder <jim.felder@GMAIL.COM>
>> *To:* vanagon@GERRY.VANAGON.COM
>> *Sent:* Wednesday, April 13, 2016 11:35 AM
>> *Subject:* Re: And what should arrive in my inbox this morning from
>> Banggood but this magnetic offer
>> 
>> Here's what I have in mind, subject to change as other parties actually
>> think this through for me:
>> 
>> 1. it is going to take a bunch of these little magnets, but that is what I
>> want, their power times hundreds.
>> 
>> 2. The magnets must be separate somehow. If they touch or clump, even after
>> being sewn in to individual pockets of cloth, that will not keep the cloth
>> from doubling over and over as the magnets find each other. Therefore,
>> 
>> 3. I intend to glue the magnets down with hot glue, say, to a flexible
>> strip of plastic, some strapping tape, say, about an inch apart.
>> 
>> 4. I will wrap the flexible but very strong magnetic strip in cloth and sew
>> it closed with a zipper foot, allowing enough left over to sew this strip
>> to the usual vinyl edging into which the screen is sewn. It is a plus that
>> the magnets are small enough to pass under a sewing foot if they have to.
>> 
>> 5. I am contemplating different approaches to an entryway, I guess two
>> pieces with an overlap in the middle will do for a first pass.
>> 
>> Jim
>> 
>> On Wed, Apr 13, 2016 at 12:55 PM Steve Williams <
>> steve@williamsitconsulting.com> wrote:
>> 
>>> Oh my heck!
>>> 
>>> I don't have the patience to work with something THAT small... that
>>> wants to stick to anything metal!  lol.
>>> 
>>> Good to know they are out there though :)
>>> 
>>> Thanks for sharing!
>>> 
>>> Cheers,
>>> Steve W.
>>> 
>>>> On 13/04/2016 10:35 AM, Karl Ploessl wrote:
>>>> if the description is correct, they are tiny: Diameter: 3mm(±0.1mm)
>>>> Height: 1mm(±0.1mm). So 500 seems to be right
>>>> 
>>>> On Wed, Apr 13, 2016 at 12:23 PM, Steve Williams
>>>> <steve@williamsitconsulting.com
>>>> <mailto:steve@williamsitconsulting.com>> wrote:
>>>> 
>>>>   Hi,
>>>> 
>>>>   Is that price $4.00 USD for 500 of them?  That doesn't make sense to
>>>>   me... but $4.00 / magnet seems expensive, but perhaps not?
>>>> 
>>>>   How many do you think it will take for the bug screen?  This is
>>>>   something I'm really interested in doing as well.
>>>> 
>>>>   Cheers,
>>>>   Steve W.
>>>> 
>>>> 
>>>>   On 13/04/2016 9:26 AM, Jim Felder wrote:
>>>> 
>>>>       A way to follow up something I have wanted to do for years,
>>>>       create an
>>>>       all-magnetic bug screen for the sliding door. These aggressive
>>>>       little
>>>>       magnets ought to do the job! Anyway, the price is right and
>>>>       they are on
>>>>       order. Once glued to a flexible plastic tape/strap (so they
>>>>       won't stick to
>>>>       each other) and sewn into edging for the netting, I'll bet
>>>>       they will work.
>>>> 
>>>>       <
>> http://www.banggood.com/500x-Disc-Rare-Earth-Neodymium-Super-Strong-Fridge-Magnets-N35-3x1m-Craft-Model-p-1042903.html?utm_design=41&utm_source=emarsys&utm_medium=Mail_mailad233_dealalert&utm_campaign=newsletter-emarsys&utm_content=Winna≻_src=email_1791754≻_eh=21b49b9fb0df57d91≻_llid=631316≻_lid=80505949≻_uid=GEFGGfoQpi&emst=GEFGGfoQpi_631316_1791754_128
>> <http://www.banggood.com/500x-Disc-Rare-Earth-Neodymium-Super-Strong-Fridge-Magnets-N35-3x1m-Craft-Model-p-1042903.html?utm_design=41&utm_source=emarsys&utm_medium=Mail_mailad233_dealalert&utm_campaign=newsletter-emarsys&utm_content=Winna&sc_src=email_1791754&sc_eh=21b49b9fb0df57d91&sc_llid=631316&sc_lid=80505949&sc_uid=GEFGGfoQpi&emst=GEFGGfoQpi_631316_1791754_128>
>>>> 
>>>>       Jim
>> 
>> 
>>