Dispenser for adhesive tape in rolls with cores of different diameters

Abstract: The device comprises a first centre (5) which can hold a roll with a tubular core of the smaller diameter, the said centre being mounted for rotation with friction on a fixed pin of the device (1), and a supplementary centre (17) which can be fitted on the said first centre (5) and can hold a roll with a tubular core of greater diameter.

Description: The invention relates to a distributing device (also known as a dispenser) for adhesive tape of considerable width - known as parcel tape - which can be presented in reels or rolls having tubular cores of at least two different diameters, of the order of 38 mm and 76 mm, for example. More particularly, the present invention relates to a dispenser of the type including: a first substantiall cylindric centre apt to hold a roll with a tubular core of a first smaller diameter, which first centre is mounted for rotation with friction on a pin of the device; and a supplementary centre which can be fitted on said first centre. A device according to the preamble of claim 1 is known from US-A-4,323,202, which discloses a dispenser which is apt to dispense an adhesive tape presented in rolls with tubular core, and which is also apt to dispense an adhesive tape from a coreless roll, by means of an adaptor core. The object of the invention is to enable two or more types of rolls having central cores of different diameters to be used with equal ease with a simple accessory which is easily applied and removed. This object is achieved by a device according to claim 1. The supplementary centre has a housing by means of which it can slide on said first centre so as to fit it thereon and extract it therefrom. Furthermore said supplementary centre has projections apt to receive and engage a roll with a tubular core of a second greater diameter. The drawing shows a possible embodiment of the invention and in particular: Figs. 1 and 2 schematically show a distributor or dispenser provided with a centre which can hold a roll of smaller diameter, Fig.2 being a local section through II-II of Fig.1; Figs. 3 and 4 show in the same way as Figs. 1 and 2 the distributor provided with the supplementary centre to hold rolls with cores of greater diameter, Fig.4 being a local section through IV-IV in Fig.3; and Figs. 5,6, and 7 are perspective views of the distributor and rolls together with the first centre and the supplementary centre for various possible uses. As shown in the attached drawings, the distributing device or dispenser, indicated in a general way by 1 and of a type known in itself, has on a flat extension 1A a pin 3 engaged in the form of a screw stud, on which may be fitted a first centre 5 which can rotate on the pin 3 with a degree of friction. For this purpose, the centre 5 has a frontal surface which can be acted on by a friction disc 7 pressed against the said frontal surface by a discoid 9 which in turn is pressed elastically by a spring 10; the load of the spring 10 can be adjusted by means of a knob 12 engaged by screwing in an axially adjustable way on a threaded rod with an end 14 which is axially engaged to form a coaxial extension of the pin 3. This friction device is familiar in itself. The said first centre 5 has small external longitudinal ribs 5A enabling the tubular core A1 of a roll B1 of adhesive parcel tape to be held with a degree of friction , the roll B1 having the said core A1 of the smaller diameter. B2 indicates a roll of adhesive tape which is formed on a core A2 of greater diameter. Both types of roll are available commercially and the distributing device 1 is equipped to be capable of using rolls of these two types or of other types having internal core diameters different from that of the core A2. This is achieved by using a special accessory in the form of a supplementary centre 17, which may be made simply in one piece from moulded synthetic resin, with large cavities to reduce the mean thickness of the said accessory; the supplementary centre 17 forms a tubular internal housing 17A with longitudinal grooves 17A1 of a size and shape such that the said supplementary centre 17 can be fitted on to the first centre 5 with ribs 5A, which remains engaged with the dispenser 1. This supplementary centre 17 also has, externally, a set of three projections 17B with small external longitudinal ribs 17C, to form an overall profile contained in a theoretical cylindrical surface which is slightly greater than the dimension of the internal cylindrical surface of the core A2 which is of greater diameter than the core A1, and on which the roll B2 is wound. The supplementary centre 17 can be fitted - as shown in Figs. 3, 4, 6 and 7 - on to the first centre 5 of the dispenser 1 with a degree of friction; a roll B2 having the core A2 of greater diameter, corresponding to the external diameter of the overall profile of the supplementary centre 17, can be fitted on the supplementary centre 17. The same distributing device or dispenser 1 can therefore be used, with the simple accessory 17 of suitable diameter, to dispense the adhesive tape either from a roll of type A1, B1 or from a roll of type A2, B2. If rolls having cores of a third diameter different from and greater than that of the roll B1, A1 come onto the market, it is possible to provide a further supplementary centre of the same type as 17 for this particular and different roll core diameter.

Claims: Distributing device for adhesive tape of considerable width presented in rolls with tubular cores, comprising: a first substantially cylindric centre (5) which can hold a roll (B1) with a tubular core (A1) of a first smaller diameter, which first centre (5) is mounted for rotation with friction on a pin (3) of the device; and a supplementary centre (17) which can be fitted on the said first centre (5), wherein said supplementary centre (17) has a housing (17A) by means of which said supplementary centre (17) is apt to slide on said first centre (5) so as to fit it thereon and extract it therefrom, and wherein said supplementary centre (17) has projections (17B) apt to receive and engage a roll (B2) with a tubular core (A2) of a second greater diameter; characterized in that said first centre (5) has three external longitudinal ribs (5A) for engaging the roll (B1) with core (A1), and in that said supplementary centre (17) in its central housing (17A) has at least three longitudinal grooves (17A1) with which said supplementary centre (17) is rotationally engaged with said external longitudinal ribs (5A) of said first centre. Distributing device according to claim 1, wherein said first smaller diameter is in the order of 38 mm and said second greater diameter is in the order of 76 mm.

Inventors: PAIELLA GIUSEPPE, PAIELLA, GIUSEPPE
Applicants: SYROM 90 SPA, SYROM 90 S.P.A.
Application year: 1993
Main classification: B65H35
IPC codes: B65H75, B65H35, B65H23, B65H16