什么(me)是裹背(bei)條，裹背(bei)條是通過皮殼機(ji)等機(ji)械(xie)用于精(jing)裝(zhuang)書(shu)(shu)(shu)本的書(shu)(shu)(shu)脊部分，使書(shu)(shu)(shu)貼連接得更加牢固(gu)。書(shu)(shu)(shu)脊制作弧(hu)長的計算，本器規(gui)格依(yi)書(shu)(shu)(shu)芯(xin)幅面(mian)大(da)小(xiao)進行調定，以能將書(shu)(shu)(shu)芯(xin)平穩(wen)地(di)送進夾書(shu)(shu)(shu)裝(zhuang)置內(nei)為(wei)標準。入本后(hou)的書(shu)(shu)(shu)冊(ce)不斜(xie)歪，四角垂直地(di)頂(ding)齊在夾書(shu)(shu)(shu)裝(zhuang)置的靠板、側(ce)規(gui)內(nei)。裁(cai)切尺寸(cun)正確一致，其質量要求與(yu)(yu)規(gui)格誤差與(yu)(yu)一般(ban)切書(shu)(shu)(shu)相同。

夾(jia)書簽絲帶(dai)裝置(zhi)安放(fang)在(zai)切(qie)書機與扒圓(yuan)起脊機之間。即將(jiang)切(qie)完(wan)的(de)書芯(xin)，用分本器從中間分開，再由輸放(fang)絲帶(dai)器將(jiang)絲帶(dai)夾(jia)入中心紙(zhi)書芯(xin)的(de)中間靠訂縫一邊。絲帶(dai)夾(jia)在(zai)書芯(xin)內兩端各(ge)留出粘邊和(he)使(shi)用的(de)余地(di)，再經切(qie)刀（剪(jian)(jian)刀式）將(jiang)其剪(jian)(jian)斷。

剪斷(duan)后(hou)的(de)(de)(de)(de)絲(si)帶，裹(guo)背條(tiao)芯(xin)部分被(bei)下(xia)面膠輥著(zhu)膠、壓實完成夾書(shu)(shu)(shu)(shu)(shu)簽絲(si)帶過程。書(shu)(shu)(shu)(shu)(shu)簽絲(si)帶的(de)(de)(de)(de)長度(du)與一(yi)(yi)(yi)般(ban)手工(gong)(gong)加工(gong)(gong)長度(du)基(ji)本相同，可(ke)依書(shu)(shu)(shu)(shu)(shu)冊幅(fu)面長度(du)調定。扒(ba)(ba)圓(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)起(qi)脊(ji)(ji)(ji)(ji)(ji)操作(zuo)及要求。書(shu)(shu)(shu)(shu)(shu)芯(xin)經(jing)裁切、夾粘絲(si)帶（或(huo)(huo)不(bu)夾粘絲(si)帶）后(hou)，繼續傳(chuan)送（或(huo)(huo)翻轉變(bian)位）并(bing)做90°翻轉，使平(ping)(ping)放書(shu)(shu)(shu)(shu)(shu)芯(xin)變(bian)為(wei)(wei)后(hou)背朝上（或(huo)(huo)朝下(xia)）而(er)進(jin)入扒(ba)(ba)圓(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)起(qi)脊(ji)(ji)(ji)(ji)(ji)機。扒(ba)(ba)圓(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)起(qi)脊(ji)(ji)(ji)(ji)(ji)機的(de)(de)(de)(de)加工(gong)(gong)，其(qi)操作(zuo)分為(wei)(wei)兩步，但機器(qi)的(de)(de)(de)(de)結構是連在一(yi)(yi)(yi)起(qi)的(de)(de)(de)(de)，均(jun)是先扒(ba)(ba)圓(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)后(hou)起(qi)脊(ji)(ji)(ji)(ji)(ji)。扒(ba)(ba)圓(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)。扒(ba)(ba)圓(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)起(qi)脊(ji)(ji)(ji)(ji)(ji)機在扒(ba)(ba)圓(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)時，由一(yi)(yi)(yi)組（或(huo)(huo)一(yi)(yi)(yi)對(dui)）圓(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)輥，將書(shu)(shu)(shu)(shu)(shu)芯(xin)壓緊后(hou)作(zuo)相對(dui)旋轉動作(zuo)），使書(shu)(shu)(shu)(shu)(shu)背扒(ba)(ba)成適當規格圓(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)勢，加工(gong)(gong)成圓(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)背書(shu)(shu)(shu)(shu)(shu)芯(xin)。書(shu)(shu)(shu)(shu)(shu)芯(xin)書(shu)(shu)(shu)(shu)(shu)背的(de)(de)(de)(de)形狀分為(wei)(wei)圓(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)背有脊(ji)(ji)(ji)(ji)(ji)、圓(yuan)(yuan)(yuan)(yuan)(yuan)(yuan)背無脊(ji)(ji)(ji)(ji)(ji)和方(fang)背（或(huo)(huo)稱平(ping)(ping)背）三種。平(ping)(ping)裝裹(guo)背條(tiao)書(shu)(shu)(shu)(shu)(shu)刊的(de)(de)(de)(de)書(shu)(shu)(shu)(shu)(shu)脊(ji)(ji)(ji)(ji)(ji)不(bu)高出(chu)(chu)書(shu)(shu)(shu)(shu)(shu)芯(xin)平(ping)(ping)面，而(er)精裝書(shu)(shu)(shu)(shu)(shu)刊的(de)(de)(de)(de)書(shu)(shu)(shu)(shu)(shu)脊(ji)(ji)(ji)(ji)(ji)一(yi)(yi)(yi)般(ban)要高出(chu)(chu)書(shu)(shu)(shu)(shu)(shu)芯(xin)的(de)(de)(de)(de)平(ping)(ping)面。書(shu)(shu)(shu)(shu)(shu)脊(ji)(ji)(ji)(ji)(ji)分為(wei)(wei)真脊(ji)(ji)(ji)(ji)(ji)和假脊(ji)(ji)(ji)(ji)(ji)。

真(zhen)脊(ji)(ji)(ji)是利用書(shu)(shu)(shu)背上下兩(liang)邊變形(xing)(xing)的(de)弧度高(gao)出(chu)書(shu)(shu)(shu)芯平面；假脊(ji)(ji)(ji)則是利用紙板鑲在書(shu)(shu)(shu)背后形(xing)(xing)成的(de)書(shu)(shu)(shu)脊(ji)(ji)(ji)，書(shu)(shu)(shu)脊(ji)(ji)(ji)的(de)脊(ji)(ji)(ji)高(gao)等于(yu)封面紙板的(de)厚度。方背書(shu)(shu)(shu)芯。是指書(shu)(shu)(shu)芯的(de)書(shu)(shu)(shu)背平直(zhi)方正(zheng)。書(shu)(shu)(shu)背不突出(chu)，與平裝(zhuang)書(shu)(shu)(shu)刊的(de)書(shu)(shu)(shu)背基本相似(si)。 

背(bei)與(yu)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)(xin)上(shang)下環襯(chen)互成直(zhi)角，由于(yu)精裝書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)(xin)是(shi)用(yong)鎖(suo)線訂(ding)訂(ding)連，每(mei)一(yi)個(ge)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)帖的(de)(de)(de)(de)訂(ding)口折(zhe)縫里面都用(yong)線串過，因此(ci)，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)(xin)背(bei)脊(ji)(ji)(ji)比書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)帖其它(ta)部(bu)(bu)分要(yao)厚一(yi)些(xie)，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)籍(ji)的(de)(de)(de)(de)帖數(shu)越多(duo)，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)脊(ji)(ji)(ji)背(bei)與(yu)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)(xin)其它(ta)部(bu)(bu)分厚度(du)(du)的(de)(de)(de)(de)差(cha)別(bie)也越大。所以方(fang)背(bei)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)(xin)的(de)(de)(de)(de)形(xing)(xing)式一(yi)般只用(yong)于(yu)厚度(du)(du)約為20mm的(de)(de)(de)(de)精裝書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)籍(ji)。圓(yuan)(yuan)背(bei)有(you)脊(ji)(ji)(ji)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)(xin)。圓(yuan)(yuan)背(bei)有(you)脊(ji)(ji)(ji)又稱(cheng)圓(yuan)(yuan)背(bei)真脊(ji)(ji)(ji)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)(xin)。書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)(xin)背(bei)部(bu)(bu)呈圓(yuan)(yuan)弧形(xing)(xing)，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)脊(ji)(ji)(ji)高起有(you)脊(ji)(ji)(ji)壟，堅硬(ying)挺(ting)實，這種書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)背(bei)的(de)(de)(de)(de)形(xing)(xing)式適合(he)于(yu)裝訂(ding)較厚的(de)(de)(de)(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)籍(ji)，裝上(shang)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)殼后有(you)明顯(xian)的(de)(de)(de)(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)槽，翻閱方(fang)便。目前我國(guo)的(de)(de)(de)(de)精裝書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)籍(ji)多(duo)采(cai)用(yong)這種圓(yuan)(yuan)背(bei)有(you)脊(ji)(ji)(ji)的(de)(de)(de)(de)加工(gong)(gong)形(xing)(xing)式。圓(yuan)(yuan)背(bei)無脊(ji)(ji)(ji)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)(xin)。圓(yuan)(yuan)背(bei)無脊(ji)(ji)(ji)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)(xin)又稱(cheng)圓(yuan)(yuan)背(bei)假脊(ji)(ji)(ji)，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)(xin)背(bei)部(bu)(bu)呈圓(yuan)(yuan)弧形(xing)(xing)，書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)背(bei)與(yu)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)(xin)的(de)(de)(de)(de)厚度(du)(du)相(xiang)同，堅實挺(ting)括，但(dan)沒(mei)(mei)有(you)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)裹背(bei)條脊(ji)(ji)(ji)。這種形(xing)(xing)式的(de)(de)(de)(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)(xin)，一(yi)般常與(yu)軟質書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)殼或塑料壓制而成的(de)(de)(de)(de)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)殼相(xiang)配套。中心紙(zhi)有(you)些(xie)機器還沒(mei)(mei)有(you)沖圓(yuan)(yuan)裝置，即(ji)將方(fang)背(bei)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)先(xian)進(jin)行沖圓(yuan)(yuan)加工(gong)(gong)，作初(chu)步(bu)定(ding)(ding)型。先(xian)根據書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)(xin)厚度(du)(du)和中心紙(zhi)幅(fu)面大小調定(ding)(ding)好夾書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)器及(ji)扒圓(yuan)(yuan)輥(gun)（或沖圓(yuan)(yuan)裝置）的(de)(de)(de)(de)規矩，再使(shi)書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)芯(xin)(xin)(xin)(xin)(xin)進(jin)入夾書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)器內并送到扒圓(yuan)(yuan)輥(gun)之(zhi)間，將書(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)(shu)背(bei)扒擠(ji)成一(yi)定(ding)(ding)圓(yuan)(yuan)勢。