Paper-processing devices such as printers, copiers, and automated teller machines are finding wide application in the modern community. A common problem they have is paper jams, which can only be avoided by understanding paper behavior in the feed path. In our technique for predicting paper stick and jamming, we introduce a formulation for deformed paper using a spring-mass-beam model, Lagrange multipliers, and functions expressing the guide plate configuration. Results for curling deformation in a sheet moving in the feed path of a printer indicate that our method predicts sticking and jamming in creased or curled sheets.