A display apparatus is disclosed that includes a screen and a frame system positioned to support the screen. The frame system includes a plurality of frame members, a hinge that couples the frame members together, and a lock that blocks relative movement of the frame members.

A self-locking collapsible display frame is described. Some implementations can include a frame kit having a top frame piece, a bottom frame piece, a left side frame piece, a right side frame piece, a first planar member, and a second planar member. The frame includes slanted dovetail joints that become locked when the first and second planar members engage the frame pieces.

A self-locking collapsible display frame is described. Some implementations can include a frame kit having a top frame piece, a bottom frame piece, a left side frame piece, a right side frame piece, a first planar member, and a second planar member. The frame includes slanted dovetail joints that become locked when the first and second planar members engage the frame pieces.

A changeable frame allows exhibits presented therein to be exchanged in a simplified manner. The frame includes a frame element surrounding a frame opening in which the exhibit is visible from an observer side. A recess in the frame element leads from a lateral outer surface to an opposite inner surface of the frame element and opens into the frame opening for insertion of the exhibit into and removal of the exhibit from the frame opening. A drawer slidably mounted in the recess has a receptacle for positioning the exhibit. The drawer is slidable between an insertion position, in which the exhibit is visible in the frame opening, and a removal position, in which the receptacle of the drawer is outside of the frame element for the removal of the exhibit from the receptacle.

Greeting devices are described herein. In some embodiments, a greeting device includes a first shell, a second shell, and a hinge pivotally coupling the first shell to the second shell. The first shell can be configured to carry or house a first substrate, and/or the second shell can be configured to carry or house second substrate. One or both of the first and second substrates can be configured to carry or display a media item, such as a message or greeting. The greeting device can be transitionable between a first configuration in which the first substrate and the second substrate face each other, and a second configuration in which the first substrate and the second substrate face away from each other.

Greeting devices are described herein. In some embodiments, a greeting device includes a first shell, a second shell, and a hinge pivotally coupling the first shell to the second shell. The first shell can be configured to carry or house a first substrate, and/or the second shell can be configured to carry or house second substrate. One or both of the first and second substrates can be configured to carry or display a media item, such as a message or greeting. The greeting device can be transitionable between a first configuration in which the first substrate and the second substrate face each other, and a second configuration in which the first substrate and the second substrate face away from each other.

A frame for the interchangeable and selective display of panels of artwork or text, where at least one interior surface of the frame defines a cavity in which one or more panels may be disposed, and channels are formed on the interior surface to receive a rod that slidably engages the channels to secure and accessibly store one or more panels within the frame. Also disclosed is a technique for disposing one or more panels within a frame for display and securing the one or more panels by advancing a rod along channels to exert force against the one or more panels.

A frame for the interchangeable and selective display of panels of artwork or text, where at least one interior surface of the frame defines a cavity in which one or more panels may be disposed, and channels are formed on the interior surface to receive a rod that slidably engages the channels to secure and accessibly store one or more panels within the frame. Also disclosed is a technique for disposing one or more panels within a frame for display and securing the one or more panels by advancing a rod along channels to exert force against the one or more panels.

A frame for displaying a placard on a grain bin is attached to the grain bin with conventional threaded fasteners having shank portions and head portions. The head portions of the fasteners attaching the frame to the bin do not interfere with the placard's insertion into the frame by way of ramp-like protuberances formed into the frame portions above where the fasteners are located. The protuberances deflect the placard over the fasteners' heads and allow the placard to be fully inserted into the frame with either a frictional, clearance or interference fit between the fastener and the frame.

A portable display screen that can be broken down into components for easy transport and storage, while also being relatively easy to assemble into a self-supporting display screen with a flat surface without distracting wrinkles or other defects.