Screws
Quality products for quality frames
Screws for Spring Hinges
The frames with spring hinges can be either in metal or plastic.
The special hinges on the temples usually contain a spring mechanism designed to automatically close or open the temples. This special mechanism also makes the temple easier to open because it provides a spring effect also when moving outwards, with the advantage of not forcing the endpiece on the frame when it is put on or removed from the face, thereby retaining the correct squaring.
Before assembling a flex temple, one can note that the joint hole and the hinge holes are not aligned because the spring on the internal mechanism keeps the joint set back. The conical tip of the flex screw ensures an easy alignment and assembly of the temple and can be easily cut off with your fingers at the end of the processing stage.
Screws for Plastic frames
Compared to metal frames, plastic ones only require one type of screw, i.e. the one needed to assemble the temples.
They do not require screws for the rimlock: Plastic frames normally have a closed rim and the lens is inserted by pressing it, generally with a hot process, thanks to a frame heater in the case of traditional materials such as acetate or with a cold one for new materials such as Ultem.
A fully closed rim does not require screws to open/close it as in the case of metal frames.
They do not require screws for nose pads: These frames do not come with the nose pads and pad arms typical of metal frames, as the bridge rests directly on the nose. Adhesive nose pads can be applied if needed.
Screws for Rimless frames
A rimless frame, also known as a ‘drill mount’ or ‘three-piece’ frame, consists of two temples and a bridge resting on the nose, while there are no rims/rings accommodating the lenses.
A rimless frame, also known as a ‘drill mount’ or ‘three-piece’ frame, consists of two temples and a bridge resting on the nose, while there are no rims/rings accommodating the lenses. The temples with the endpieces are coupled to the lenses via a screw held into place by a nut or via two small rivets pressed into a hollow plastic rivet.
The bridge of the frame is attached to the lenses with the same procedure used for the endpieces. This means that lenses for rimless eyeglasses have a hole both on the nose side and on the side near the temples.
The ideal screw assembly involves the use of various small parts shown in the image below: