Universal winding machine for a multitude of tray designs

Abstract

A suture attaching station attaches a needle and a suture to form a single combination. The setup of the crimping unit is facilitated by using an offline measuring fixture. The offline measuring fixture is calibrated by placing a precision gage block into the measuring fixture and then zeroing a digital measuring unit. The gage block is then replaced by the desired crimping die and the reading is noted as an offset for the servo drive of the suture attaching station. This offset is used to set the zero point of the crimping die centre.

Claims

1. An apparatus for attaching surgical sutures to needles, comprising: a crimping unit; an exchangeable crimping die; and a measuring fixture comprising a measuring unit to measure a dimensional height of the exchangeable crimping die and to measure a dimensional height of a precision gage block, said precision gage block being interchangeable with the exchangeable crimping die.

2. A method, comprising: providing the apparatus as in claim 1; calibrating the measuring unit with the precision gage block; measuring the dimensional height of the exchangeable crimping die as an offset to the precision gage block; and using the offset for setting a zero point of the center of the exchangeable crimping die.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) In the following text, the invention will be described and explained in greater detail using the exemplary embodiments which are shown in the drawings.

(2) FIG. 1 is a schematic view of the winding machine with suture attaching machine.

(3) FIG. 2 is a schematic view of the suture attaching machine according to FIG. 1.

(4) FIG. 3 is a schematic view of the offline measuring fixture of the suture attaching machine.

DETAILED DESCRIPTION

(5) The combined machine 10 according to FIG. 1 consists of two main units, the first unit being a suture attaching station 12 and the second unit being a winding machine 14.

(6) The suture attaching station 12 attaches the needle and suture to form a single combination. This station 12 is shown in greater detail in FIG. 2. The setup of the crimping unit 20 is facilitated by using an offline measuring fixture 22 which is shown in FIG. 3. The offline measuring fixture 22 is calibrated by placing a precision gage block 24 into the measuring fixture 22 and then zeroing the digital measuring unit 26. The gage block 24 is then replaced by the desired crimping die 30 and the reading is noted as an offset for the servo drive of the suture attaching station 12. This offset is used to set the zero point of the crimping die centre 32. This can be done manually via the HMI of the station or automatically when the measurement system is connected to the machine plc. The crimping dies usually have a top part and a bottom part.

(7) The needle and suture combination is then transferred to the winding machine 14, which is preferred to be inline but can be at any angle. Referring to FIG. 1, the winding machine 14 has a base platform 40 with a rotary dial mounted thereon. In this preferred embodiment there are eight package nests on the rotary dial. Each of the package nests is labelled so it will be possible to track the trays during the winding process. There could be more than eight package nests or less than this, depending on the number of stations necessary for the winding process.

(8) This type of rotary dial is widely used in the art so it is not described in detail. On the outside of the rotary dial is the base plate for mounting each of the stations. This modular design allows for quick customization of the stations as may be required by the design of the tray or by station requirements.

(9) The first station 50 is the tray infeed. This station 50 is shown at nine o'clock of the rotary dial according to FIG. 1. This type of infeed station 50 is widely used in the art so it is not described in detail. In principal, there are two options. There could be a single stack of trays to be loaded into the package nests or there could be a multi stack carrousel. In both cases the trays are singularized and placed onto the package nests.

(10) In the shown embodiment, the package nests are rotated in an anticlockwise direction. The second station 52 is an open station for further options. For example, this station 52 could be used to load a top of the tray. It would also be possible to cut and place a foam in this station 52. If micro-needles do not fit into the needle park of the tray, such a foam might be necessary.

(11) In the third station 60 the needle with an attached suture is fed in and parked in the tray. The third station 60 comprises two infeed lines 62, 64. The infeed lines 62, 64 are positioned at 90-degree angle to each other. The primary infeed line 62 is used for the transfer from the suture attaching station 12 to the winding machine 14. The secondary infeed line 64 is used for manual loading of a needle when switched to stand alone mode.

(12) The infeed slides of infeed line 62, 64 move to the pickup station of the third station 60. Infeed slides like this are widely used in the art so they are not described in detail. At the pickup station robot grippers grip the needles from the infeed slides. The slide then returns to its loading position. The robot grippers now travel to the package nest of the rotary dial and load the needle into a needle park of the tray.

(13) The fourth station 90 is the winding station. This winding station 90 can wind trays with vacuum present or without vacuum present. If there is no vacuum present during the winding, it is usually necessary to have the lid placed directly after the needle parking and before starting the winding of the suture. Therefore, in this case the fifth station 110 together with the sixth station 112 should be placed after the third station 60 and before the winding station 90.

(14) The fifth station 110 is a printing and lid placement station. The lids could be pre-printed paper lids of plastic lids or the like. This type of station 110 is widely used in the art so it is not described in detail.

(15) The sixth station 112 is the lid attachment station. The lid could be attached by using ultrasonic sound or heated die, for example. By using ultrasonic sound or heated die it is possible to deform the standoff members of the trays, thereby locking the lid in place. This type of station 112 is widely used in the art so it is not described in detail.

(16) The seventh station 114 is an offloading station. After offloading, the trays are usually transported to an intermediate inspection station (not shown). This type of station 114 is widely used in the art so it is not described in detail. The intermediate inspection station is usually the station where all camera inspections are performed. The tray is then transferred to an outfeed section 116 which can be a belt or a magazine, for example. It could also be transferred to a reject area. It can be advantageous to have a demagnetisation of the needle before offloading the tray.

(17) This kind of intermediate inspection station is widely used in the art so it is not described in detail.

(18) The eighth station 118 is an open station for further options. For example, this station 118 could be used for a camera check in order to confirm the offloading of the tray.

(19) In contrast to the circular layout of the rotary dial 42, there could also be an inline form for the suture winding machine 14. It is also possible to have a combination of a rotary dial 42 and an inline form. The winding process of the present invention can be used with tray suture packages of various designs. The shape of the tray 14 can be essentially circular to oval. It can also be oval with finger indentations on the outer periphery (peanut shape).