US Patent 11535450 Item loading by chamber bounded by synchronized conveying surfaces

An insertion system (e.g., in a warehouse or other item-fulfillment environment) can include a chassis. A bottom conveying surface, a first side conveying surface, and a second side conveying surface may be fastened to the chassis respectively along the chassis's bottom face, first lateral face, and second lateral face. A chamber may be bounded by the conveying surfaces and by a rear wall defined at least in part by the front face of the chassis. A linear actuator coupled with the chassis may move the chassis from a home position and toward an extended position to advance the bottom conveying surface, the first side conveying surface, and the second side conveying surface along with the rear wall of the chamber to decrease a size of the chamber and advance contents of the chamber in a depth direction toward a receiving zone.