Joe B.

Expert ★★★★★ 27,853 satisfied customers

Specialities: Windows 11/10, Printers, Print quality, Fuser units, Envelopes & special media

Envelopes print wrinkled from envelope tray — laser printer fuser temperature, bypass tray & straight-path rules

Technician

Hey! Let’s figure out why the envelope tray prints wrinkled envelopes while normal paper is fine.
To aim this at the right fix, a few details help: Are you printing on a laser printer (with a hot fuser) or inkjet? Do the wrinkles or creases happen only when you use the envelope tray, or even through the bypass tray / manual feed? And when you send the job, are you choosing a media type like “Envelope / Thick / Heavy”, or is it still set to Plain paper in the driver?

Customer

It’s a laser printer. Regular A4 from the main tray is perfect. As soon as I print #10 envelopes from the envelope tray, they come out wrinkled and creased, especially near the flap. Sometimes the corner is curled so badly it looks like it went through a roller wrong. I tried the manual feed / bypass slot a couple of times and the envelopes were flatter, but I really want to use the dedicated envelope tray.

Technician

Got it — classic wrinkled envelopes / creased envelopes scenario when the paper path and fuser temperature don’t match the media.

With a laser printer, the envelope is squeezed through rollers and heated in the fuser unit at around 170–200 °C. Envelopes are thicker, have seams and glue, and sometimes a glossy coating. If you run them around a tight path (like a standard cassette path) with the wrong media type, you get:

• Wrinkles or buckling in the middle as the envelope hits high heat and pressure.
• Diagonal creases where the seams or flap fold through the fuser.
• Extra curl at the leading or trailing edge when the envelope exits.

Our plan:
1) Prove it’s path + fuser settings by comparing envelope tray vs bypass tray output.
2) Check envelope stock, humidity, and how the envelope tray guides are set.
3) Adjust paper type / fuser mode / fuser levers so the printer uses the right heat and pressure for envelopes.
4) Route envelopes through the most straight-through / bypass path the printer offers, especially for thicker or C5/DL envelopes.

Customer

I’m on Windows 11 in a small office. We use standard #10 and DL envelopes, nothing fancy. From the envelope tray, about every envelope is wrinkled, sometimes with a big crease near the middle. If I switch to the bypass tray and feed them one stack at a time, they come out better, but that’s slower and awkward. The printer menu is set to “Envelope” for that tray, but I haven’t touched anything called “fuser mode”.

Technician

Step 1 — Compare envelope tray vs bypass tray (path test)
Let’s confirm the paper path is the main problem:
1) Load 5–10 fresh, flat envelopes in the bypass / manual feed tray. Open the rear output door if your printer supports a straight path.
2) On Windows, in the print dialog, pick the correct size (e.g., Envelope #10 or DL), set the paper type / media type to Envelope or Thick, and choose the bypass tray as the source.
3) Print a test address layout. Check if the envelopes are mostly flat, maybe only slightly curled but not badly wrinkled or crushed around the flap.
4) Now print the same file from the envelope tray (tray 1, tray 2, or the dedicated envelope feeder), with the same driver settings.
If wrinkles and creases only show up from the envelope tray and not the bypass tray, it means that tray’s path bends the envelopes too sharply for their thickness, or its fuser pressure / envelope mode isn’t tuned correctly.

Customer

I just tried that. Bypass tray with the rear door open gave me a tiny bit of curl but no serious wrinkles. Using the envelope tray, the same batch of envelopes came out with a diagonal crease halfway down and some of them were crumpled near the trailing edge. Regular A4 still looks perfect, so it’s only envelope printing that’s messed up.

Technician

Perfect test — that tells us the envelope tray path is tougher on the envelopes than the bypass tray.

General rules for wrinkled envelopes from a laser printer:
• Use the bypass tray / manual feed slot whenever possible. It’s usually a more straight-through path with fewer bends, which greatly reduces wrinkling and creasing.
• If the printer has fuser or pressure levers labelled for Envelope / Thick, they often need to be switched when feeding from the envelope tray so envelopes don’t get crushed.
• Make sure the envelope tray’s side guides are snug against the envelopes without bowing them; loose guides let the stack skew, causing diagonal creases.
• Don’t overfill the envelope tray — half-capacity or less is better so the feed rollers don’t dig into the leading edge and cause buckling.
Your bypass tray result shows the printer can print flat envelopes. We just need to apply the same “straight-path + correct fuser settings” logic to how your office uses the machine.

Customer

That makes sense, but the dedicated envelope tray is supposed to make life easier. If I crank up anything related to fuser temperature, am I going to cook the glue or seal the envelopes shut? The envelopes aren’t super thick, just regular office ones, but they do have gummed flaps.

Technician

Great question — we don’t want to turn your envelopes into toast. 😊

The trick isn’t blindly “turning up the heat”, it’s choosing the correct media type / fuser mode for envelopes so the printer uses the right combination of:

• Fuser temperature (how hot the rollers run),
• Fuser speed (how long the envelope sits in the heat), and
• Pressure (some models change roller pressure for Thick or Envelope).

On many HP/Brother/Canon/Xerox models, when you set the tray’s paper type to “Envelope” or “Thick / Heavy”, it automatically switches to an envelope-friendly fuser mode. That can actually reduce wrinkling, because the printer slows the envelope down and adjusts pressure instead of smashing it like plain paper.

The safety rules:
• Only use laser-compatible envelopes that can handle around 170–200 °C without warping or the glue bubbling.
• Avoid envelopes with exposed glue inside the print area or thick, multi-layer windows — those can wrinkle or melt no matter what.
• Store envelopes flat and dry; damp envelopes wrinkle much more easily in the fuser.
So yes, we’ll tweak fuser behavior, but via the paper type / envelope mode the manufacturer intended — not random overheating.

Customer

In the Windows dialog I see options like Plain, Thick, Thick 2, Envelope, etc., but nothing called “fuser mode”. On the printer panel I saw something about “envelope mode” for tray 1. How exactly should I set things so envelopes don’t get wrinkled, especially when we’re using the envelope tray?

Technician

Step 2 — Match tray configuration, driver media type, and fuser mode
Let’s lock in consistent settings so envelope printing doesn’t fight itself.

1) On the printer’s front panel, set the tray you use for envelopes (envelope tray or bypass) to the correct size (e.g., DL, COM10) and type Envelope / Thick. Many models use this to decide which fuser pressure and temperature profile to use.
2) In Windows 11, right-click the printer → Printing preferences. Under Paper / Quality:

• Set Source to the tray you’re actually using for envelopes.
• Set Paper Size to the correct envelope size.
• Set Paper Type / Media Type to Envelope or, if you still see wrinkling, Thick or Thick 2 per the manual.

3) If the printer has a menu for Fuser Mode or Envelope Mode, make sure the mode for “Envelope” media is enabled. On some devices there are even fuser levers you move for envelopes to reduce wrinkles.
4) Save these as an “Envelopes – bypass tray” preset so your team can pick it from Word/Excel without hunting through every setting again.

When tray type, driver media type, and fuser mode all say “envelope”, wrinkling drops dramatically compared to feeding envelopes like normal 80 g/m² paper.

Customer

We’re sharing this printer between a few people. Some feed from the bypass tray, some from the envelope tray, and nobody really pays attention to the “paper type” setting. Is there a simple set of rules I can put on a label so envelopes stop coming out wrinkled or folded, no matter who’s printing?

Technician

Absolutely — envelope printing is one of those “write the rules and tape them to the printer” problems. Here’s a good set of universal rules that stop most wrinkled envelopes from the envelope tray or bypass tray:

• Always use the bypass tray / straight path for envelopes thicker than standard or with big flaps or windows.
• Set paper type to Envelope or Thick in the print dialog every time you print envelopes. No “Plain paper” for envelopes.
• Load small stacks only in the envelope tray; don’t overfill. Make sure the stack is flat, edges aligned, and the side guides are snug.
• Do not duplex envelopes, and don’t run them through any internal “turning” paths if your printer offers a rear exit or straight-through slot.
• Use only laser-safe envelopes (it usually says so on the box). If envelopes are already curled, bent, or soft from humidity, they’re much more likely to wrinkle in the fuser.
• If your model has fuser levers / envelope levers accessible from a rear or side door, set them to the envelope position before a batch, and turn them back after you’re done with envelopes.

Put a simple sign next to the device: “For envelopes: use bypass tray, set paper type = Envelope, rear door open.” That alone saves a lot of crushed mail.

Customer

I followed your steps: set the tray to Envelope, created an “Envelopes – bypass” preset with the right media type, opened the rear door, and used a fresh box of laser-compatible envelopes. Printing from the bypass tray now gives almost perfectly flat envelopes, and even the envelope tray looks better with smaller stacks. Only a little curl on the edge now, no big wrinkles or creases.

Technician

That sounds much healthier. A bit of curl is normal — thick stock leaves the fuser slightly curved — but no more wrinkled, crushed, or folded envelopes is exactly what we wanted.

Final checks so your envelope tray doesn’t start printing wrinkled again:
• Every few months, clean or replace the feed rollers that pull envelopes in, especially for the envelope or bypass tray.
• Don’t reuse envelopes that have already jammed or wrinkled — they’ll almost always crease again and can damage the fuser over time.
• Keep envelopes sealed in the box until you need them; store them flat in a low-humidity spot near the printer.
• If you still see random creasing even after the right settings and good envelopes, it may be a worn fuser unit or exit rollers and the printer might need service or a fuser replacement.
But day-to-day, sticking to the bypass tray + envelope media type + straight-through path rules will keep your envelope runs clean and professional.

Customer

Perfect, this is exactly what we needed. Envelopes are no longer wrinkled coming out of the printer, and the team has clear “envelope rules” to follow. Thanks a lot!

Technician

Summary: If your envelope tray prints wrinkled envelopes, the fix is to treat envelopes like special media: use the bypass tray or straight-through path when possible, set the tray and driver to an Envelope / Thick media type so the fuser temperature and pressure are correct, keep envelope stacks small and flat, and only use laser-safe envelopes. After that, most creases, buckling, and severe curl disappear. Want help matching these settings to your exact model? Open the chat and an expert will walk through it with you step-by-step.

Quick answer: the accepted fix

Accepted fix when an envelope tray prints wrinkled or creased envelopes: print a test batch through the bypass tray / manual feed with the rear door open to confirm a straighter path, then set the tray and driver to the correct envelope size and media type (Envelope / Thick) so the printer uses the right fuser mode. Keep the envelope tray lightly loaded with flat, laser-safe envelopes, snug the side guides, and avoid duplex or tight turns. If envelopes still wrinkle, switch to the straight-through bypass path for all envelope jobs and inspect the fuser / rollers for wear.

FAQ

Step-by-step (Windows 11/10)

1. On the printer’s control panel, set the tray you use for envelopes (envelope tray or bypass) to the correct envelope size and type = Envelope / Thick.
2. In Windows 11/10, open Printers & scanners → Printing preferences and set:
   • Source = Bypass tray or envelope tray,
   • Paper Size = your envelope size (e.g., #10, DL, C5),
   • Paper Type / Media Type = Envelope, Thick, or Heavy as recommended in your manual.
3. For test runs, use the bypass tray with the rear output door open so envelopes follow a straight path through the fuser.
4. Create and save an “Envelopes” preset in the driver so everyone can select it from Word/Excel instead of re-configuring settings each time.

Note for macOS & USB/networked printers

1. In System Settings → Printers & Scanners, select your printer and open Options & Supplies → Driver / Options to ensure the bypass tray / manual feed and any envelope options are enabled.
2. In the macOS print dialog, choose the proper envelope size, select the envelope or bypass tray as the source, and set the Media Type to Envelope or Thick before printing.

Sources

• HP LaserJet Printer Family Print Media Guide — envelopes and wrinkling guidelines (PDF)
• HP LaserJet 9000 Printer series — Preventing wrinkles on envelopes
• Epson AcuLaser M4000 Series User’s Guide — envelope wrinkling and fuser lever adjustments (PDF)

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