Double Feed on a Card Line: How to Stop Two Cards at Once
When two cards leave the feeder together, collation and counts both break. This post breaks down five causes of double feed on a card line and how to tune them out before shipping.
On a trading-card line, a double feed (two cards out at once) or cards stuck together (several moving as one) is one of the sneakiest faults. It rarely trips an alarm, yet it causes mis-collation, count errors, and two cards jammed in one seal — and a rejected batch. Here are the five most common causes our engineers see, and how to tune them out.
1. Suction Too Strong — Picking Two Cards
2. Static Clings Cards Together
3. Separator Wheel or Brush Gap Off
4. Stack Too Tall or Humid — Cards Stick
5. Pickup and Belt Speed Out of Sync
Why It Matters on a Card Line
A double feed won't sound an alarm, but every extra card becomes a mis-collated box, a wrong count, and a complaint. Double-feed detection plus reliable single-card separation is what lets you ship consistent boxes with zero mis-collation — and gives collectors a correctly collated set.
See Stable Single-Card Feeding Live
These are the exact checks our engineers run on every CHANFER card line before it ships. See stable single-card feeding at PRINTING United Expo 2026, Booth N7411, Las Vegas, Sept 23–25 — bring your card sample and we'll show you a zero-double-feed result on the spot.
Book Sept 23-25 US Show