Catalog or 7.5x10.5 envelope safe for digital presses?

[FLPrintShop]

Looking for a catalog envelope or something slightly smaller like 7.5x10.5, preferably white but kraft/manila would also work, for our KM presses. No peel-n-seal, press-n-seal, or clasp, just normal gummed envelopes.

Uline has a 7.5x10.5, but they're 'heavily gummed' and I don't want to risk trying them on our new machines. We don't print them to mail in, typically schools will use them as a fundraiser collection tool with (typically) color printing on both sides.

 

[jwheeler]

We run standard 6x9, 6.9x9.5 and 9x12 catalog or booklet envelopes on our KM's all the time without any issue - so I'd imagine the 7.5x10.5 would work the same (see the KM models we have in my signature below). We don't purchase special digital ones. They tend to run easier than #10 envelopes, and you can even run them without the envelope fuser. You just need to turn off double sheet detection in the paper settings.

We also run 9.5x12.5 manila envelopes for one customer. These are two-sided and we can run both sides in a single pass. It's actually more problematic to try and run one side at a time.

We purchase our envelopes from KellySpicers, and we usually get the Shasta brand.

 

[Ynot_UK]

We run standard 6x9, 6.9x9.5 and 9x12 catalog or booklet envelopes on our KM's all the time without any issue

We have only recently started printing envelopes on our KM C4080, I perhaps naively thought you could only put peel & seal stock through the fuser.
The peel & seal stock we have run successfully was out of the box flap closed and we ran them flap closed from Tray 5 (with the flap as the leading edge to maintain it closed throughout the process)
So back to Gummed envelopes - presumably these are supplied out of the box as flap closed and you'd run as above?

 

[jwheeler]

We have only recently started printing envelopes on our KM C4080, I perhaps naively thought you could only put peel & seal stock through the fuser.
The peel & seal stock we have run successfully was out of the box flap closed and we ran them flap closed from Tray 5 (with the flap as the leading edge to maintain it closed throughout the process)
So back to Gummed envelopes - presumably these are supplied out of the box as flap closed and you'd run as above?

Mostly yes...however, we've found that the 6x9 and 6.5x9.5 envelopes run better from the long edge, flap towards the back of the machine if they are catalog envelopes (flap on the short edge).

And no, you're not limited to peel & seal. However, I would strongly recommend you get side-seam envelopes when you start running #10 envelopes. We run #10 from the short edge, closed flap, and the flap towards the back of the machine. Make sure you have the envelope fuser for them, and you'll need to install the brackets (A) shown in the photo below, along with flipping out the "small sized guides". On a side note, the brackets (A) are very useful when running divider tabs. The hold the tabs into place so they don't blow backwards.

 

[Ynot_UK]

Thanks as always @jwheeler - that's all good learning that will be put to use!

 

[FLPrintShop]

Are there any east-coast suppliers of a catalog envelope safe to run on our KM's? We have had issues with 'heavily gummed' materials from ULine, etc-the sensors get covered with the gum.

We also have issues running #10 SEF on our 6136 with the envelope fuser. They end up going through crooked-even with the fuser the belt speeds are too fast. Can't run them LEF as the horizontal bracket does not close all the way, so we run on our 4080 without issue, but at a higher cost. Local KM support can't provide a reason or solution despite having other operators locally who run #10 on similar machine-they only suggest running flap open LEF, but I can't find a manufacturer that sells them flap open (nor can KM suggest one.) We typically use Mac for #10.

 

[jwheeler]

I'd be interested to see photos of how you're setting up the drawer @FLPrintShop . We have 3 KM 6136's and run #10 envelopes no problem...cases of them! In fact, we use the DIP switch that allows us to feed them out of multiple vacuum feed drawers so they can run continuously. We also run 6x9's, 9x12's, and 10x13's. When we run the catalog envelopes, we don't use the envelope fuser, we just turn off double-feed detection.

 

[jwheeler]

And as previously mentioned, if you're not using side-seam envelopes, they run MUCH better than diagonal seams.

 

[TJPrinter]

I don't run a KM so I can't help there, but if you want to try an open flap envelope you can find them at Western States Envelope.
Extended Open Flap #10